The shoot - down announcement was made Tuesday but is just now becoming public . The 165 Raptor fighter aircraft have been kept at lower altitudes during ongoing probe . Flying above 25,000 feet can cause pilots to black out . This came from Gen. William Fraser , head of Air Combat Command .
The stand-down order was made Tuesday but is just now becoming public . The 165 Raptor fighter jets have been kept at lower altitudes during ongoing probe . Flying above 25,000 feet could cause pilots to black out . Order came from Gen. William Fraser , head of Air Combat Command .