USAF Master Sargent Leah Messer (left with US flag), a 15-year transgender veteran of the United States Air Force, would lose her job if Donald Trump's tweets become policy. Photo courtesy AVER.

GLAAD CEO Sarah Kate Ellis is among the many criticizing Trump's ban. Photo by Melissa Wasserman

USAF Master Sargent Leah Messer (left with US flag), a 15-year transgender veteran of the United States Air Force, would lose her job if Donald Trump's tweets become policy. Photo from AVER