Apr 16: A glance at some sporting events and teams that have been affected by attacks and threats:
Sept. 5-6, 1972 -- Palestinians going by the name of "Black September" kill 11 Israeli athletes at the 1972 Munich Olympics.
April 21, 1987 -- A car bomb kills more than 100 people at a bus station in Colombo, Sri Lanka. The blast came during a tour of the country by the New Zealand cricket team. The three-Test tour was cut to one.
Feb. 11, 1996 -- Cricket teams from Australia and the West Indies refuse to play preliminary World Cup matches in Sri Lanka a week after a huge bomb blast in Colombo killed 80 people and injures 1,200.
July 27, 1996 -- Centennial Park bombing at Atlanta Olympics. The attack took place during a nighttime music concert at the Centennial Olympic Park. The explosion killed one person and injured over 100 others.