Clouds over Yokota
YOKOTA AIR BASE, Japan -- Thick clouds drift by the flightline at Yokota Air Base, Japan, May 1, 2012. Surrounded by water, the average relative humidity in Japan is 71.2 percent according to www.climatetemp.info, almost 20 percentage points higher than the U.S. average. (U.S. Air Force photo illustration/Staff Sgt. Samuel Morse)