What do you do?
Object off Alaska coast may be WWII sub
Underwater sonar images of a black shape against a background of grainy monochrome are safely stored on two computer hard drives at Bruce Abele's home in Newton, Mass.
Blurred by odd shadows and striations, the silhouettes are the biggest clues in more than 60 years to the fate of his father's World War II submarine, the USS Grunion, which sank nearly 5,000 miles west of Massachusetts, near the obscure islands at the tip of Alaska's Aleutian chain.
[via Jon Nichols]