While the repeal of "Don't Ask, Don't Tell" means gays and lesbians can now serve openly in the military, transgender service members are still banned.

But over the weekend, Defense Secretary Chuck Hagel said in an interview with ABC's "This Week" that he was "open" to a review of the policy:

"It continually should be reviewed, I'm open to that, by the way. I'm open to those assessments. Because, again, I go back to the bottom line. Every qualified American who wants to serve our country should have the opportunity. If they fit the qualifications and can do it."

Professor Aaron Belkin, who studies transgender military service and is Director of the Palm Center at San Francisco State University, joins the show to talk about the Pentagon's policy on transgender people in the military.