Blast Clues May Signal End to Decade of Foiled Jet-Bomb Plots

  • Thwarted schemes didn't ease concerns ahead of Egyptian crash
  • Checkpoints remain a risk: `I've been worrying about this'

Debris of the A321 Russian airliner lie on the ground a day after the plane crashed in Wadi al-Zolomat, a mountainous area in Egypt's Sinai Peninsula, on November 1, 2015.

Photographer: Khaled Desouki/AFP via Getty Images

For more than a decade, terrorists tried and failed to bring down jetliners with explosives in carry-on liquids, in air freight and even in their underwear.

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