n 1920. Armenian
leaders remain preoccupied by the long conflict with Muslim
Azerbaijan over Nagorno-Karabakh, a primarily Armenian-populated
region, assigned to Soviet Azerbaijan in the 1920s by Moscow.
Armenia and Azerbaijan began fighting over the area in 1988; the
struggle escalated after both countries attained independence from
the Soviet Union in 1991. By May 1994, when a cease-fire took hold,
Armenian forces held not only Nagorno-Karabakh but also a
significant portion of Azerbaijan proper. The economies of both
sides have been hurt by their inability to make substantial progress
toward a peaceful resolution. Turkey imposed an economic blockade on
Armenia and closed the common border because of the Armenian
occupation of Nagorno-Karabakh and surrounding areas.

Aruba
Discovered and claimed for Spain in 1499, Aruba was acquired
by the Dutch in 1636. The island's economy has been dominated by
three main industries. A 19th century gold rush was followed by
prosperity brought on by the opening in 1924 of an oil refinery. The
last decades of the 20th century saw a boom in the tourism industry.
Aruba seceded from the Netherlands Antilles in 1986 and became a
separate, autonomous member of the Kingdom of the Netherlands.
Movement toward full independence was halted at Aruba's request in
1990.

Ashmore and Cartier Islands
These uninhabited islands came under
Australian authority in 1931; formal administration began two years
later. Ashmore Reef supports a rich and diverse avian and marine
habitat; in 1983, it became a National Nature Reserve. Cartier
Island, a former bombing range, is now a marine reserve.

Atlantic Ocean
The Atlantic Ocean is the second largest of the
world's five oceans (after the Pacific Ocean, but larger than the
Indian Ocean, Southern Ocean, and Arctic Ocean). The Kiel Canal
(Germany), Oresund (Denmark-Sweden), Bosporus (Turkey), Strait of
Gibraltar (Morocco-Spain), and the Saint Lawrence Seaway (Canada-US)
are important strategic access waterways. The decision by the
International Hydrographic Organization in the spring of 2000 to
delimit a fifth world ocean, the Southern Ocean, removed the portion
of the Atlantic Ocean south of 60 degrees south.

Australia
Aboriginal settlers arrived on the continent from
Southeast Asia about 40,000 years before the first Europeans began
exploration in the 17th century. No formal