Gee - what a tough subject because I feel for someone who genuinely feels trapped in a body of the opposite sex. But lets look at this from a military viewpoint - your basic fighting force. A soldier puts his life in the hands of the soldier next to him - and vice-versa. Depending on where a trans is in their conversion, their mind can't possibly be entirely on their job. In short form - because it's even more complicated - before their discovery/transformation, a trans is heavily conflicted (I could only imagine the scope of such conflict).....the trans process itself is a grueling ordeal with hormonal and physical challenges - and afterwards, there's a physical, mental and social adaptation. The entire process can last years if not decades.  Common sense (not emotion - not hand wringing empathy) says that in many cases - maybe not all - trans people are not a good fit for the military. They have my sympathy, but we must do everything we can to NOT put soldiers at risk.