One of the former Soviet Union's major bioweapons facilities was abandoned on Vozrozhdeniya Island in this body of water. A dam partially named for this body of water was completed in 2005 and has reversed part of the most obvious problem with this body of water. From 1852 to 1883, Russia maintained a naval fleet in this body of water. Identify this body of water which as recently as 1960 was the fourth largest lake in the world, but is now a mostly dried desert on the Kazakh-Uzbek border.
Aral Sea