The chairman of the Joint Chiefs of Staff on Tuesday used Twitter to restate his position that gays and lesbians should be allowed to serve openly in the military.
Stand by what I said: Allowing homosexuals to serve openly is the right thing to do. Comes down to integrity.
Mullen's words represent the strongest statement to date by a top military official in support of the repeal.
Hearings on "Don't ask, don't tell" comes almost a week after President Barack Obama called for a prompt reversal of the policy during his State of the Union address.
Vice President Joe Biden on Tuesday said he expects the military to lift the policy by year's end.