Reports of al Qaeda preparing so-called "belly bombs" designed to be surgically implanted in potential terrorists before they board airplanes have already led to increased scrutiny for anyone traveling to the U.S. who appears to have had recent surgery, U.S. officials said.
The Department of Homeland Security recently issued a bulletin warning of renewed interested in the tactic -- suspected to be the latest innovation from infamous alleged bomb maker Ibrahim Asiri. According to U.S. officials, a would-be attacker would slip through airport security, board a plane and detonate the bomb using a chemical-filled syringe, says an ABC News report.