Tsien's time in Washington would be exciting but brief. He found the city still reeling from four years of wartime chaos -- during which time the number of federal employees nearly doubled and the number of records created in those four years surpassed the total from its entire previous history. Issued a gold badge and a top-secret clearance, Tsien worked as a scientific consultant in the Pentagon, the gigantic structure built only two years earlier to bring the headquarters of the Army, Navy, and Army Air Force under one roof.
In December and January, General Henry Arnold held several Pentagon meetings to outline his mission for the. Scientific Advisory Group (SAG). Listening to his speeches were some three dozen young men in their thirties and forties, soberly dressed in suits and ties. "For twenty years, the Air Force was built around pilots, pilots and more pilots," Arnold said. "The next twenty years is going to be built around scientists."
Arnold urged them to search nationwide and abroad for developments that would make American air power the very best in the world. Don't worry about