This is taken straight from the declassified Operation Northwoods report. When you want information go straight to the source, not an opinion like MrAJ. All the plans involved NOT KILLING AMERICANS, but only to give the appearance. We might have a sick and twisted military, but there not out to kill our citizens.

"b. We could blow up a drone (unmannded) vessel anywhere
in the Cuban waters. We could arrange to cause such incident
in the vicinity of Havana or Santiago as a spectacular result
of Cuban attack from the air or sea, or both. The presense
of Cuban planes or ships merely investigating the intent of
the vessel could be fairly compelling evidence that the ship
was taken under attack. The nearness to Havana or Santiago
would add credibility especially to those people that might
have heard the blast or have seen the fire. The US could
follow with an air/sea rescue operation covered by US
fighters to "evacuate" remaining members of the non-existant
crew. Casualty lists in US newspapers would cause a helpful
wave of national indignation."