Arizona testers

Laguna Army Air Field lies deep in the desert, just north of Yuma, Arizona. The airfield is part of one of the largest military installations in the world – the Yuma Proving Grounds (YPG) – as Frank Crébas discovers. YUMA PROVING GROUNDS Veteran UH-1H 74-22443 during one of its final sorties from Laguna Army Air Field late last year. All photos Frank Crébas IN THE BLISTERING desert heat of southern Arizona, the US Army Test and Evaluation Command (ATEC) operates