NATICK, Mass. — A World War II museum in Massachusetts is displaying artifacts commemorating the Pearl Harbor attack ahead of the Dec. 7 anniversary.

The International Museum of World War II says it recently acquired a life ring from the USS Arizona.

The battleship was among those destroyed in the surprise attack by Japan on the U.S naval base in Hawaii that prompted the U.S. to enter the war in 1941.

The ship's sunken remains are now a national memorial.

The museum, located in the Boston suburb of Natick, also displays many other artifacts related to the attack.

Among them is Japan's formal declaration of war against the U.S., pieces of Japanese planes shot down at Pearl Harbor and women's panties that read: "Remember Pearl Harbor, Don't Get Caught with Your Pants Down."