"you listed very strong arguments, but non-NATO-sources state, that in spring/summer 1999 there had been some severe crashes of helicopters and aircrafts of the US-Forces, which happend "officially" in South America, Philipines, etc., but should have happened actually somewhere in the Westbalkans or in the Adriatic Sea." Do you REALLY think this is realistic? 25 men die, their families know they and their unit are in the Balkans... so do hundreds of comrades etc. etc... NOTHING is secret in the days of bloggers and internet... In this day and age, something like this cannot be kept secret. You are assuming that the hundreds of people who would know about it would never get drunk and talk in a bar, or brag to a girlfriend etc. etc. I think that is really on the Elvis at Burgerking level ;-)