21 Dec 1988 – United Kingdom: Pan Am flight 103 is destroyed by a bomb over Lockerbie, Scotland; all 259 passengers and 11 on the ground were killed; Libya responsible.
22 Dec 2001 – United States: Richard Reid attempts to detonate a bomb on board American airlines flight 63 but is subdued by passengers.
25 Dec 2009 – United States: Umar Farouk Abdulmutallab attempts to detonate plastic explosives on board Northwest Airlines flight 253 en route to Detroit; al-Qaeda in the Arabian Peninsula claimed responsibility for the failed attack.
27 Dec 2007 – Pakistan: Former Prime Minister Benazir Bhutto assassinated after a campaign rally in Rawalpindi; al-Qaeda claimed responsibility.
27 Dec 2002 – Russia: Suicide bombers detonate two explosive-filled trucks at Chechnya’s pro-Moscow government building, killing 72 and injuring 210.
30 Dec 2013 – Russia: At least 34 killed in three attacks over the four days in Volgograd; Ansar al-Sunna claimed responsibility in Jan 14 linked to Imirat Kavak.
Dates are taken from the NCTC terrorist calendar and 361 Security Significant dates.