Can any of you explain to me how any conclusion can be drawn to any degree of certainty that there was any culpability on the part of the flight of four aircraft? Niknak has it seems. The thread is about what happened over the central US, not Europe. If you know anything about the limitations of TCAS, flight regime of involved aircraft, etc then you would know to stay quiet. More information than what was provided in the story is required to make anything other than an uninformed opinion or a smarta$$ remark. Do you argue otherwise?