SAN DIEGO (FOX 5/KUSI) — A team of researchers captured high-definition pictures of a sunken World War I-era U.S. Navy submarine off the coast of San Diego, over a century after it was lost at sea.

Thursday marks the 100th anniversary of the U.S. entry into World War I, and some of the innovations that were developed or came into wide use during the conflict are still with us today.

The wreck of a German U-boat that sank nearly 100 years ago has been discovered off the southwest coast of Scotland by engineers laying underwater power cables. Remarkable sonar images show the ...