Vice President Joe Biden says a shooting Monday at the Washington Navy Yard is a "God-awful reminder" of the need for Americans to stay vigilant.
He says he's confident the nation will get to the bottom of the situation.
Biden says the situation is still unfolding, but that his heart and sorrow goes out to all those affected. He says the tragedy is almost unthinkable.
The shooting rampage in the heart of a U.S. Navy left at least 12 people dead. One shooter was killed, but police were looking for one other possible gunman.
Biden spoke at a port in Savannah during an event highlighting the need to invest in U.S. infrastructure. He was being briefed Monday by his national security team as he visited South Carolina and Georgia.
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