On Thursday, the U.S. military successfully tested a new hypersonic missile. The missile flies at eight times the speed of sound with a range measured in the thousands of miles. That allows the missile to hit a target anywhere on earth in less than an hour. Guy Raz talks with Noah Shachtman of Wired.com about how the Army's Advanced Hypersonic Missile works.

More illegal immigrants are crossing the U.S. and Mexico border by sea. As law enforcement cracks down on the risky sea journeys, immigrant smugglers are taking their contraband loads even farther up the coast of California, sometimes hundreds of miles from the border.

Top Pentagon leaders went to Capitol Hill Tuesday and took tough questions from lawmakers on the future of the U.S. relationship with Iraq. Specifically, they addressed how the decision to withdraw all U.S. combat troops by the end of this year will impact Iraq's stability — and U.S. national security interests in the region. Secretary of Defense Leon Panetta told a congressional committee that, while U.S. military commanders wanted to keep a contingency force on the ground, it was Iraq's decision to make.

Ali Mussa Daqduq, a senior explosives expert from Hezbollah, has been held as an enemy combatant since he was captured by American troops five years ago. But once U.S. troops withdraw from Iraq, authorities face a choice about the future of enemy combatants: prosecute them, release them or send them home.

Though most are known to deal with drugs and weapons, a new FBI threat assessment says street gangs have been moving into some different territory lately: human trafficking. The FBI says gang members increasingly are pushing women and children into prostitution.