Window may be closing on possibility that Malaysian jetliner disappearance was aviation accident

Summary: It's been nearly a week since Malaysian Airlines Flight 370 disappeared en route to Beijing. Ships and planes from a growing number of nations have helped expand the hunt. And news sources have quoted unnamed officials who say the jet changed course, possibly in an act of piracy. Hari Sreenivasan interviews Andy Pasztor of The Wall Street Journal and former NTSB chairman Jim Hall.