Obama Says US Confronting "Yet Another Mass Shooting"
Description:President Barack Obama said the United States is facing "yet another mass shooting" with an armed attack at Washington's Navy Yard on Monday, and vowed to hold accountable whomever was responsible. With details still emerging about the shootings at the Navy Yard, Obama said he had been briefed on the situation, and that the shooting had targeted military and civilian personnel. The president spoke at the start of a speech focused on the U.S. economy.(1:54)