In this photo provided by the U.S. Navy, a Navy launch pulls up to the blazing USS West Virginia to rescue a sailor, Dec. 7, 1941, during the attack on Pearl Harbor.

Photos: Remembering Pearl Harbor

On Dec. 7, 1941, the Imperial Japanese navy launched a surprise attack on the U.S. Navy base at Pearl Harbor in Hawaii.

Ugly Sweater Run

Photos: Ugly Sweater Run

The Ugly Sweater Run hit the streets of Grand Rapids on Saturday, Dec. 5, 2015.

This aerial view shows a Southern California social services center in San Bernardino, Calif., where authorities said multiple people were shot Wednesday, Dec. 2, 2015. (KTTV via AP)

Photos: Shooting in San Bernardino

Multiple people were shot on Dec. 2, 2015 at a California social services center, and police were searching for up to three gunmen.