The Pakistani intelligence service is behind the recent attack on a major Indian air force base in Punjab using a terrorist group it created 15 years ago, according to well-informed press and other knowledgeable sources. The attack is designed to prevent any detente between India and Pakistan after Prime Minister Narendra Modi’s surprise Christmas Day visit to Pakistan.

The escalating violence between the two nuclear-weapons states, which have already fought four wars, threatens to get worse. The Pakistani intelligence service has the capability to launch more attacks with little notice, at some point prompting a vigorous Indian response.

On Dec. 31, a team of terrorists infiltrated across the Pakistani border into India. On Saturday they assaulted the Pathankot air base, one of India’s largest air force installations near the border. At least seven Indian soldiers were killed in the fighting, which lasted for days. On Sunday, the Indian Consulate in Mazar-e Sharif in northern Afghanistan was also attacked by gunmen.

Both attacks are the work of the Pakistani terror group Jaish e Muhammad, according to reliable press reports. JEM was created in 2000 by Mualana Masoud Azhar, a longtime Pakistani terrorist leader. Azhar was captured in India in 1994 after taking western hostages in Kashmir. In December 1999 a group of terrorists hijacked an Air India jet flying from Nepal to India and diverted it to Afghanistan. They demanded the release of Azhar and his colleagues in return for the passengers and crew.

And they got it, thanks to help from the Pakistani intelligence service ISI and al Qaeda leader Osama bin Laden, according to accounts of the hijacking based on the Indian officials who negotiated with the terrorists for the hostages’ freedom.

The Afghan Taliban assisted the hijackers once they got to Afghanistan. Once Azhar was traded for the hostages, the ISI took him on a public victory tour through Pakistan to raise money for the jihad against India, and he announced the formation of Jaish e Muhammad, or the Army of Muhammad, in early 2000. JEM received training and weapons from the ISI and worked closely with al Qaeda.

In December 2001, JEM terrorists working with terrorists from another ISI-backed group, Lashkar e Tayyiba (LET), attacked the Indian parliament building in New Delhi. That attack prompted India to mobilize its military, and a tense standoff went on for nine months. Only intense mediation by President Bush’s national security team averted war.

Azhar kept a low profile for several years after LET’s 2008 attack on Mumbai, but he reappeared publicly in 2014, giving fiery calls for more attacks on India and the United States. His group is technically illegal in Pakistan but enjoys the continuing patronage of the ISI.

The ISI is under the generals’ command and is composed of army officers, so the spies are controlled by the Pakistani army, which justifies its large budget and nuclear weapons program by citing the Indian menace. Any diminution in tensions with India might risk the army’s lock on its control of Pakistan’s national security policy. The army continues to distinguish between “good” terrorists like JEM and LET and “bad” terrorists like the Pakistani Taliban, despite decades of lectures from American leaders.

The army has long distrusted Prime Minister Nawaz Sharif, who has advocated a detente with India since the 1990s. An army coup in 1999 sent him into exile in Saudi Arabia for a decade. His warm embrace of Modi on Christmas Day in his home in Lahore undoubtedly angered the generals.

Modi’s visit was the first by an Indian prime minister in more than a decade. It was also Sharif’s birthday and the birthday of Pakistan’s founder, Muhammad Jinnah. Modi’s decision to visit and the warm family greeting Sharif extended set the stage for a planned resumption of formal diplomatic negotiations between the two countries scheduled for later this month.

So far New Delhi has not canceled the planned talks. Modi’s advisers are well aware of the double game the Pakistani army plays and the differences inside the Pakistani establishment. After four wars with Pakistan and a nuclear arms race, Indian experts understand the complexity of the dynamics inside Islamabad. The Indians have accepted Prime Minister Sharif’s public condemnation of the attack and promised to provide evidence of JEM’s role to his government, including cellphones captured in the attack.

Washington put JEM on the terrorist sanctions list years ago—but it continues to coddle the Pakistani army. Gen. Raheel Sharif, the army’s boss (and no relation to the prime minister) got a warm embrace from the Pentagon last fall—despite the ISI’s support for the Afghan Taliban’s offensive against the Kabul government and despite the Pakistani military’s backing of terror groups like JEM.

This piece was originally published by The Daily Beast.

Editors' Note: Brookings Nonresident Senior Fellow Richard Feinberg reports from Havana on President Obama's historic visit to the island. 

Havana is abuzz at the sheer weight of the president of the United States arriving in Cuba. In the hours before President Obama’s arrival, astonished Cubans told tales of planeloads of black limousines and massive Suburbans, of heavily armed security personnel, of sunglass-sporting secret service officers arriving at the airport and making their way through the city.

Cubans have anticipated the arrival of the Obama family with considerable joyfulness, but the festive mood is colored by a certain reticence, a deep-seated fear of, once again, being overwhelmed by the Colossus from the North. 

The government has bargained hard with Obama’s advance team to hem him in, to limit his direct contact with the Cuban people. There will be no large outdoor speech—rather on Tuesday morning Obama will address a hand-picked audience in the newly renovated Grand Theatre with its limited seating capacity—although the Cuban government agreed to live television coverage. The U.S. president will also meet with local entrepreneurs, but in a constricted venue, and ditto for his meeting with independent civil society and political dissidents.

On Tuesday afternoon the president will be the guest of honor at an exhibition game between the visiting Tampa Bay Rays (their chance selection was by lottery) and the Cuban national team. The White House has hinted that he will throw out the first ball, but this could not be confirmed. On a prior occasion, Jimmy Carter did indeed throw out the first ball, but that was during a visit long after his presidency.

Putting the lanky, athletic Obama on the mound would run a certain risk for the Cubans. Suppose the excited crowd begins to cheer, “Obama, Obama…” Even more dangerous, imagine if the exuberant Cubans follow with, “USA, USA, USA…”

Back home, critics of the Obama administration say he’s made too many concessions to the Cuban government without reciprocity. Cuba is no closer to a liberal democracy, they argue, than it was on December 17, 2014, when Barack Obama and Raúl Castro announced their decision to normalize diplomatic relations. But these skeptics miss this vital point: By befriending the president of the United States, the president of Cuba and first secretary of the Cuban Communist Party (PCC) has exploded his regime’s long-standing national security paradigm organized around the imminent danger posed by a hostile empire. The rationale for the state-of-siege mentality, the explanation for the poor economic performance, no longer resonates. The ruling political bureau of the PCC stands exposed before the Cuban people.

Hence, the government is working hard to persuade the people that it has not forsaken its nationalist credentials: the PCC’s daily newspaper, Gramna, ran a fierce editorial warning for Obama not to try to step on their little island, not to intervene in its internal affairs; rather, he must arrive as a classic Greek suitor bearing gifts. But no Trojan horses, the Cubans are too wary to be fooled so easily.

Venezuelan President Nicolás Maduro, passing through Havana this week, pointedly remarked: “The hearts of the Cuban and Venezuelan people are warm and true. Not like others who come with smiles but hide a clenched fist.”

In truth, most Cubans very much want the trip to succeed. They want more tourists, more remittances from Cuban-Americans living in Florida and New Jersey. They would welcome more trade, more access to famous U.S. consumer brands. Many would even welcome U.S. investment—with the promise of good jobs and better wages. All would love to be able to travel freely between their island and the outside world, especially to the nearby United States. In short, they yearn for normality.

And savvy Cubans sense the link between the more relaxed diplomatic atmosphere and the gradual opening of political space so evident on the island. While not yet living in a fully open society, Cubans are now more willing to express their views openly, to foreigners and among themselves. Some are even forming proto-civil society groupings, to advance gender equality, environmental stewardship, religious freedom, and human rights.

Bathing in these new liberties, Cubans worry that something, anything, could go wrong during the visit. In such a highly scrutinized setting, one misstep, one awkward phrase, one misinterpretation of Cuban history, would give ammunition to hardliners to set the clock back and to restore the old national security paradigm.

Raúl Castro has pinned his own legacy too closely to the young U.S. president to allow any stumbles during this historic visit, to stand idly by while the visit was twisted by his internal opponents. And Raúl and his confidants retain control over the mass media in Cuba, and the PCC will loyally pass along the party line, as set by the political bureau and echoed all along the chain of command, down to the district and village level.

So the visit will be declared a success. Most likely, it will truly be a marvelous moment, because Obama is just the right person to stretch out the U.S. hand to the long-aggrieved Cuban people. The very traits for which Obama is so often criticized at home will serve him well in Cuba: his humility, his respectfulness, his sense of irony—these are just what Cubans have been harking for from the United States for so many decades.

The Cubans will also love Michelle Obama and the two teenage Obama daughters, especially if Sasha and Malia are freed to wander forth and meet their contemporaries at one of Havana’s clubs where young people gather—the Cuban media and public will bask in the respect being paid to Cuban music and dance, to “Cubanismo.”

Obama and Castro share some goals, and conflict on others. Both wish for a peaceful transition to a more prosperous Cuba, more open to the world and to global commerce. But they differ on the endgame: Obama would like to see a more liberal, pluralistic polity, while Castro presumably wants to see his Communist Party retain its grip on power. But that chess match will be waged later, by their successors. 

For Barack Obama and Raúl Castro, today their interests are convergent. Hence, we can predict that, most likely, the visit will be a great success, a historic legacy for which both statesmen will be justly proud.