WASHINGTON (AP)-- Vice President Joe Biden said Friday that the country is evolving on the issue of gay marriage and he thinks it's inevitable there will be national consensus.He said on ABC's "Good Morning America" the same thing is happening with the issue of marriage that happened with gays' service in the military.Changes in attitudes by military leaders, those in the service and the public allowed the repeal by Congress of the "don't ask, don't tell" policy that will eventually allow gays to serve openly in the military.Read More... More on Gay Marriage