There's also this which occurred in NYC in the 70s and remains unsolved: http://observer.com/2016/01/why-hasnt-washington-explained-the-1975-laguardia-airport-

There's also this which occurred in NYC in the 70s and remains unsolved: http://observer.com/2016/01/why-hasnt-washington-explained-the-1975-laguardia-airport-bombing/ http://observer.com/2016/01/why-hasnt-washington-explained-t...