Khan has yet to stand trial, but he will likely spend many years in prison and could be sentenced to death. According to Sayed Ansari, a spokesman for the NDS, suicide bombers are not appointed defense attorneys. "It's a crime that does not require a defense lawyer," he said.

Shortly before he was arrested, Khan had a dream. His mother was crying, telling him, "My son, you are caught in a very dangerous place. May God help you."

He thinks of her often.

Somewhere in the mountains of Pakistan she is waiting for her only child to return from buying flour.