Asia is the world's largest and most populous continent. It covers 8.6% of the Earth's total surface area (or 29.4% of its land area) and, with almost 4 billion people, it contains more than 60% of the world's current human population.
Chiefly in the eastern and northern hemispheres, Asia is traditionally defined as part of the landmass of Africa-Eurasia – with the western portion of the latter occupied by Europe – lying east of the Suez Canal, east of the Ural Mountains, and south of the Caucasus Mountains and the Caspian and Black Seas. It is bounded to the east by the Pacific Ocean, to the south by the Indian Ocean, and to the north by the Arctic Ocean.
Given its size and diversity, Asia – a toponym dating back to classical antiquity – is more a cultural concept incorporating a number of regions and peoples than a homogeneous physical entity. From the standpoint of physical geography, Europe and Asia are considered parts of the single continent or supercontinent of Eurasia.
In reaction to the bombing of Pearl Harbor by Japan in 1941, United States Executive Order 9066 on February 19, 1942 allowed military commanders to designate areas "from which any or all persons may be excluded." Under this order all Japanese and Americans of Japanese ancestry were removed from Western coastal regions to guarded camps in Arkansas, Oregon, Washington, Wyoming, Colorado and Arizona; German and Italian citizens, permanent residents, and American citizens of those respective ancestries (and American citizen family members) were removed from (among other places) the West and East Coast and relocated or interned, and roughly one-third of the US was declared an exclusionary zone. Interestingly, Hawaii, despite a large Japanese population, did not use internment camps, probably as a result of the islands being placed under martial law for the duration of the war.
On December 21, 2006 President Bush signed H.R. 1492 into law guaranteeing $38,000,000 in federal money to restore the Jerome relocation center along with nine other former Japanese internment camps. "H.R. 1492".