Vice President Joe Biden is criticizing Ryan and Mitt Romney for launching political attacks before they knew the facts on the ground.
Ryan says the U.S. is witnessing the unraveling of President Barack Obama's foreign policy. He says the attack that killed U.S. Ambassador Chris Stevens shows the U.S. is projecting weakness abroad.
Biden says that's, quote, "a bunch of malarkey." He says the U.S. will bring those responsible to justice and ensure any mistakes aren't repeated.
The vice president says Obama has led with a steady hand and clear vision, and that Romney would do the opposite.