U.S. President Barack Obama and First Lady Michelle Obama

U.S. President Barack Obama and First Lady Michelle Obama

Saul Loeb/AFP via Getty Images

U.S. President Barack Obama and First Lady Michelle Obama light candles honoring the 26 students and teachers killed at Sandy Hook Elementary School in Newtown, Connecticut, in the Map Rom of the White House in Washington, D.C., on Dec. 14, 2013.