National Geographic : 1949 Jul
Veteran Pilots Huddle with the Author in Last-minute Briefing At his home field near Clinton, Maryland, Mr. Markwith is about to take off on the westward leg of his aerial adventure. Chris Martin, left, and Al Howard, right, taught him to fly. Martin, a former Navy pilot and manager of Hyde Field, began to fly when he was 15 and has logged more than 8,000 hours. To Strain Out Water, a Sonoran Refuels 692 Through aChamois When gasoline supplies become low, water often condenses inunderground storage tanks. If it gets into aplane's fuel, itcauses engine failure, possibly a crash landing. The Hermosillo, Mexico, runway ispacked adobe, hard and smooth as concrete.