National Geographic : 1945 Apr
U.S.Army Air Forces, Official Aviation Engineers and Ground Crewmen on Saipan Eagerly Watch a Superfortress Take Off for Tokyo Runways are built of coral cut from a near-by mountainside. Our advance across the" Pacific has been speeded by the use of coral for quick construction of airways. On many islands fresh coral is scooped directly from the reef and rolled onto the airstrips. Wet with salt water, itcements together into ahard, firm surface.