21.   The Russian nuclear submarine Kursk was an immense, dark shape on the Barents Sea floor when Don Degener first saw it.

22.   The submarine is to be dismantled.

23.   The submarine was one of three Soviet, and two U.S., nuclear-armed subs to sink during the Cold War.

24.   The submarine will not be open for public tours like the nine other Seafair ships.

25.   The Snezhnogorsk submarines are only part of a much larger problem in the Murmansk region.

26.   The two submarines were, in fact, the vanguard of an American intelligence operation.

27.   The United States has made considerable efforts over the years to make sure its submarines are difficult to detect.

28.   The submarine was either lost or the mission was never carried out, but the imperial Japanese government had already tested biological warfare on Chinese cities during the war.

29.   The unmanned submarines are a test and a challenge, Provost Osburn said.

30.   They insist that the Memphis was not damaged and that no other submarine was involved in any collision.