This was a rare case of a parcel bomb (as opposed to a baggage bomb) crashing an airliner.

ECONOMIST: A history of parcel bombs

Lennon has endured sectarian threats against him throughout his career as a player and manager at Celtic and was the target of a parcel bomb campaign, which also saw devices sent to QC Paul McBride and MSP Trish Godman.

BBC: Online hate site

Al-Qaeda in the Arabian Peninsula (AQAP) is locked in an increasingly pitched battle with the government of Yemeni president Ali Abdullah Saleh, even as it has taken time out to target Western capitals in a recent foiled parcel bomb campaign.

FORBES: Meet Saif al-Adel: Al Qaeda's Rumored New Leader