Christian Nwadike was shocked when he learned the man accused of gunning down over a dozen people turned out to be the coworker he sat only feet from for nearly four years. He said Farook was different after he returned from Saudi Arabia.

“Do you believe that he was radicalized?” Begnaud asked him.

“Yes, by the wife, I think he married a terrorist,” Nwadike said.

“He married a terrorist?”

“Yes, he was set up through that marriage,” Nwadike responded.

A law enforcement source tells CBS News that the bombs found in the couple’s home are near carbon copies of explosives shown in an issue of al Qaeda’s on-line magazine “Inspire,” which printed instructions on “how to build a bomb in the kitchen of your mom.”