President Barack Obama on Tuesday hailed the end of the policy banning gays from serving openly in the armed forces, as the Pentagon vowed "zero tolerance" for harassment of homosexuals in the military. "Today, the discriminatory law known as 'Don't Ask, Don't Tell' is finally and formally repealed," Obama said in a statement. "As of today, patriotic Americans in uniform will no longer have to lie about who they are in order to serve the country they love." The repeal went into effect on Tuesday, ushering in a new era in the armed forces. The law had allowed gay men...