October 10, 1933 - First air sabotage

[Webb]

United Airlines Chesterton Crash

[quote]On October 10, 1933, a Boeing 247 propliner operated by United Air Lines and registered as NC13304, crashed near Chesterton, Indiana. The transcontinental flight, carrying three crew and four passengers, had originated in Newark, New Jersey, with its final destination in Oakland, California. It had already landed in Cleveland and was headed to its next stop in Chicago, but exploded en route. All aboard died in the crash, which was proven to have been deliberately caused by an on-board explosive device ...

Melvin Purvis, head of the Chicago office of the United States Bureau of Investigation