For almost as long as there have been passenger planes, there have been criminals and terrorists who want to bring them down.
The first happened 82 years ago; the most recent definitive incident – twin bombings in Russia – was 11 years ago. And U.S. intelligence suggested Wednesday that an ISIS bomb might have brought down the Russian airliner that crashed in Egypt’s Sinai Peninsula.
There also have been several attempts to blow up planes headed to the United States and other plots involving explosives and airliners though the years. Several of the plots involve al Qaeda in the Arabian Peninsula, the terrorist network’s affiliate in Yemen.
