As if there wasn't enough reason not to sleep at night, take a look at this ABC article. This is one of the most horrifying things I've ever read. Snip:

_Friendly Fire_
Book: U.S. Military Drafted Plans to Terrorize U.S. Cities to Provoke War With Cuba
By David Ruppe
N E W  Y O R K, May 1 ? In the early 1960s, America's top military leaders reportedly drafted plans to kill innocent people and commit acts of terrorism in U.S. cities to create public support for a war against Cuba.

Code named Operation Northwoods, the plans reportedly included the possible assassination of Cuban émigrés, sinking boats of Cuban refugees on the high seas, hijacking planes, blowing up a U.S. ship, and even orchestrating violent terrorism in U.S. cities.

The plans were developed as ways to trick the American public and the international community into supporting a war to oust Cuba's then new leader, communist Fidel Castro.