Was the Islamic State really behind the attack in Texas?

Aired: 5/5/2015 | 0:04:22 | Clip
The Islamic State claimed responsibility for an attack in Texas outside an exhibit and contest of cartoons considered offensive by many Muslims. If true, it would be the first attack on U.S. soil by the militant group. But investigators questioned any direct connection between the Islamic State and the two American Muslim shooters, who were shot and killed by a policeman. Judy Woodruff reports.