I haven't SEEN (i.e. experienced or witnessed) any examples of Christianity being forced on anyone in 16 years of commissioned service. I'm familiar with the problems of evangelicalism at the AF Academy, but it's not as though the officer ranks require bible study participation. Truth in lending, I am a Roman Catholic; however that's between God and me. It's never affected my professional relationship with other officers or soldiers. Your experience may be quite different.
As for openly serving homosexuals, Ken White had an excellent point in this thread, stating that as American society becomes more tolerant, so too will the Army.
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