FILE - In this July 27, 2014 file photo provided by U.S. Customs and Border Protection shows Tashfeen Malik, left, and Syed Farook, as they passed through O'Hare International Airport in Chicago. A homemade bomb left behind by the husband and wife who perpetrated a mass shooting at a California social services center didn’t detonate because it was poorly constructed, two law enforcement officials told The Associated Press. (U.S. Customs and Border Protection via AP, File) Photo: Uncredited