Adm. Mike Mullen, the chairman of the U.S. Joint Chiefs of Staff, said he supports Congress using its lame-duck session to end the ban on gays serving openly in the military.

"I think it belies us as an institution," Mullen told ABC News' "This Week" on Sunday. "We value integrity as an institution."

"...Asking individuals to come in and lie about who they are everyday goes counter to who we are as an institution," Mullen said.

The Senate is slated to vote on a bill that would repeal the "Don't Ask, Don't Tell" after the Thanksgiving recess.

Meanwhile, a Pentagon's report on the impact of ending "Don't Ask, Don't Tell" is scheduled to be released on Nov. 30.

"We'll have this report done here and to Secretary (Robert) Gates in the next couple of weeks." Mullen said. "And I won't make any comments on where I think we need to go until that report is done."