X-Cave. X-Cave has two vertical joint passages that meander through a large layer of limestone, putting you up-close to beautiful cave formations. The name of this cave refers to the configuration of its passages which cross in the center of the cave to form the letter X.
The total count of 5,032 aircraft includes all manned and unmanned aircraft in the Air Forceâs inventory. This report assesses the Air Forceâs fleet of tactical aircraft which, as noted in the introduction and described below, requires 1,200 planes to execute a two-MRC strategy.
As of February 2016, there were just 109 airframes in storage at AMARC, Davis-Monthan Air Force Base, Tucson, Arizona. 715 were originally built. Since then, many have crashed flying close to the ground. Many planes were lost in wars.