Airports-with unpaved runways: total: 9,407 over 3,047 m: 1 2,438 to 3,047 m: 6 1,524 to 2,437 m: 164 914 to 1,523 m: 1,686 under 914 m: 7,550 (1997 est.)
Heliports: 109 (1997 est.)
@United States:Military
Military branches: Department of the Army, Department of the Navy (includes Marine Corps), Department of the Air Force note: the Coast Guard falls under the Department of Transportation, but in wartime reports to the Department of the Navy
Military manpower-military age: 18 years of age
Military manpower-availability: males age 15-49: 69,672,519 (1998 est.)
Military manpower-fit for military service: males: NA
Military manpower-reaching military age annually: males: 1,990,912 (1998 est.)
Military expenditures-dollar figure: $267.2 billion (1997 est.)
Military expenditures-percent of GDP: 3.4% (1997 est.)