Oddly, today's crash of a Malaysia Airlines Flight 17 shares a date with another major airline disaster, the crash of TWA Flight 800 over Long Island on July 17, 1996.
After a four-year investigation, however, the NTSB determined that a fuel tank explosion — sparked by a short circuit in the wiring — caused the crash. The safety board found that witnesses were vague or imprecise in their recollections.
The FBI also conducted an investigation, and it did not find evidence of a crime.