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The wreckage of a A321 Russian airliner in Wadi al-Zolomat, a mountainous area of Egypt's Sinai Peninsula. Russian airline Kogalymavia's flight 9268 crashed en route from Sharm el-Sheikh to Saint Petersburg on October 31, killing all 224 people on board, the vast majority of them Russian tourists. AFP PHOTO / RUSSIA'S EMERGENCY MINISTRY / MAXIM GRIGORYEV
*RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / RUSSIA'S EMERGENCY MINISTRY / MAXIM GRIGORYEV" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS *MAXIM GRIGORYEV/AFP/Getty Images
The wreckage of a A321 Russian airliner in Wadi al-Zolomat, a mountainous area of Egypt's Sinai Peninsula. Russian airline Kogalymavia's flight 9268 crashed en route from Sharm el-Sheikh to Saint Petersburg on October 31, killing all 224 people on board, the vast majority of them Russian tourists. AFP PHOTO / RUSSIA'S EMERGENCY MINISTRY / MAXIM GRIGORYEV
*RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / RUSSIA'S EMERGENCY MINISTRY / MAXIM GRIGORYEV" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS *MAXIM GRIGORYEV/AFP/Getty Images

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Can't bring down a plane from 'a pickup truck'

The theory that a missile may have brought down the Russian airplane over Sinai is "a little bit more difficult to justify," says a former air-crash investigator.

Can't bring down a plane from 'a pickup truck'

The theory that a missile may have brought down the Russian airplane over Sinai is "a little bit more difficult to justify," says a former air-crash investigator.