2016 Omar Mateen shot dead 49 at the Pulse nightclub in Orlando. His parents were originally from Afghanistan. He was born in New York.
2015 Syed Rizwan Farook and his wife Tashfeen Malik shot dead 14 people at an office in San Bernardino, Ca., before they were killed. He was born in Chicago to parents from Pakistan. She was born in Pakistan and raised mostly in Saudi Arabia.
2015 Mohammad Abdulazeez opened fire at two military recruiting centers in Chattanooga, Tenn., killing five U.S. military personnel. He was a naturalized American who was born in Kuwait to parents who were Jordanian and Palestinian.
2013 Two brothers, Tamerlan and Dzhokhar Tsarnaev carried out the Boston Marathon bombing that killed three. Tamerlan was born in the Soviet Union (now southern Russia), and Dzokhar was born in Kyrgyzstan.
2009 Army Maj. Nidal Hasan, shot dead 13 in Ft. Hood, Texas. Hasan, who was born in Virginia to Palestinian parents who had immigrated from the West Bank, has been sentenced to the death penalty.
2009 Abdulhakim Muhammad shot and killed an Army private at a recruiting center in Little Rock. He was born in Memphis to a Christian family, but converted to Islam and changed his name from Carlos Bledsoe.
2002 Egyptian national Hesham Hadayet shot dead two Israelis at the El Al airline ticket counter at the Los Angeles Airport before being killed.