Mexico continues search for quake survivors and answers

Search-and-rescue missions continue across Mexico City. More

Search-and-rescue missions continue across Mexico City in the wake of the massive earthquake that struck the country Tuesday afternoon. There is a rush to bring machinery in and clean the rubble, but some worry that an abrupt clean-up would erase the lessons of why certain buildings collapsed. Judy Woodruff talks to William Brangham about how the city is addressing damaged buildings.

AIR DATE 9/22/17