On September 11 , 1976 , a group of Croatian nationalists planted a bomb in a coin locker at Grand Central Terminal . The group also hijacked a plane . After stating their political demands , they revealed the location and provided the instructions for disarming the Grand Central Terminal bomb . The disarming operation was not executed properly and the resulting explosion injured three NYPD officers and killed one bomb squad specialist
hijacked a plane
TWA Flight 355
History of Grand Central Terminal