The U.S. Armed Forces has used the Social Security number as an identification number for the Army and Air Force since July 1, 1969, the Navy and Marine Corps since January 1, 1972, and the Coast Guard since October 1, 1974. Previously, the United States military used a much more complicated system of service numbers.
| Share | Cite. Cameroon (kÄmËÉrÅnË) [ key ], Fr. Cameroun, officially Republic of Cameroon, republic (2005 est. pop. 16,380,000), 183,568 sq mi (475,442 sq km), W central Africa.
Aloba Arch is one of the most magnificent natural arches in the world, located in the Ennedi Range of the Sahara Desert in Chad. This is not a natural bridge, but a very large alcove arch. Aloba Arch has a span of approximately 250 feet, but perhaps more striking than the span, is the sheer height of the arch.