Subprime mortgages have been linked to a meltdown in housing and questionable Wall Street practices, and they may have been the original domino that set off America's current economic crisis.

Among military planners, it is common to devise war games to counter any nuclear attack by enemy states. The theories put forward in such games, however, are not always grounded in reality. The peace community should alertly challenge such thinking, says Firdaus Ahmed.