1920
Sept. 16, New York City: TNT bomb planted in unattended horse-drawn wagon exploded on Wall Street opposite House of Morgan, killing 35 people and injuring hundreds more. Bolshevist or anarchist terrorists believed responsible, but crime never solved.
1975
Jan. 24, New York City: bomb set off in historic Fraunces Tavern killed 4 and injured more than 50 people. Puerto Rican nationalist group (FALN) claimed responsibility, and police tied 13 other bombings to the group.
1993
Feb. 26, New York City: bomb exploded in basement garage of World Trade Center, killing 6 and injuring at least 1,040 others. In 1995, militant Islamist Sheik Omar Abdel Rahman and 9 others were convicted of conspiracy charges, and in 1998, Ramzi Yousef, believed to have been the mastermind, was convicted of the bombing. Al-Qaeda involvement is suspected.
1995
April 19, Oklahoma City: car bomb exploded outside federal office building, collapsing wall and floors. 168 people were killed, including 19 children and 1 person who died in rescue effort. Over 220 buildings sustained damage. Timothy McVeigh and Terry Nichols later convicted in the antigovernment plot to avenge the Branch Davidian standoff in Waco, Tex., exactly 2 years earlier.
2001
Sept. 11, New York City, Arlington, Va., and Shanksville, Pa.: hijackers crashed 2 commercial jets into twin towers of World Trade Center; 2 more hijacked jets were crashed into the Pentagon and a field in rural Pa. Total dead and missing numbered 2,9921: 2,749 in New York City, 184 at the Pentagon, 40 in Pa., and 19 hijackers. Islamic al-Qaeda terrorist group blamed.