Thirty seals were killed after completeing there mission,they did not have a reason to remove any rangers as they appeared to be safe after the completed mission.When the seals were leaving in there Chinook helicoper when It was shot down. So with the rangers being safe and none Injured enough to be evacuated. When no other regular soldiers being on board. I ask you why an elite unit that only trained and carries there own,was asked to carry travel companions not being seals were on board.If we don't carry rangers and regulars,why non-regulars. For special elite units that need to conceal there missions. That question could never have the correct answer,the elite units train together for a reason,why change after sucess.