metrojet crash
The Russian plane crashed over Egypt's Sinai Peninsula Oct. 31 and killed all 224 people on board.
A homemade explosive device blew up on the plane, Alexander Bortnikov said.
WHAT'S HAPPENING
WHAT'S HAPPENING
Officials told the AP about broken scanners and bribes for looking the other way.
A leading U.S. air security official warns of changes as the investigation inches closer to the possibility of an onboard bomb.