Homeland security warns of Casio watches as bomb triggers

Off in the distance, I can hear the wailing of the hipsters and the rending of their ironic garments. Boing Boing reader Christian Cantrell says,
The Department of Homeland Security and the FBI issued a warning to the Transportation Security Administration recently stating that al-Qaida may attempt to use watches with cigarette lighters or Casio watches with built-in altimeters to detonate bombs on board US airliners. Apparently, the altimeters built into some Casio watches can be modified to detonate bombs at certain altitudes. They are apparently favored by cost-conscious terrorists since Casio watches are affordable and easily obtained.
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