U.S. President Joe Biden reminisced Tuesday about when he unexpectedly endorsed gay marriage as vice-president in 2012 — prompting President Barack Obama to do the same — as he signed same-sex and interracicial marriage into U.S. law. U.S. President Joe Biden signed gay marriage legislation into law Tuesday before a crowd of thousands, a ceremony that reflected growing acceptance of same-sex unions. "This law and the love it defends strike a blow against hate in all its forms," Biden said on the South Lawn of the White House. "And that's why this law matters to every single American." Lawmakers from...