Pilots in the 1st Aero Squadron trained in fabric-covered single-engine biplanes called “Jennys.” Fast forward 100 years and the unbroken record of service continues as U-2 pilots soar above 80,000 feet. The U.S. military’s oldest flying unit, the 1st Reconnaissance Squadron, had a centennial celebration last week at Beale Air Force Base. The U.S. Army organized the 1st Aero Squadron (Provisional) March 5, 1913, and asked the squadron to help with security along the U.S. border with Mexico in Texas and New Mexico. In March 1916, the squadron became the first tactical aviation unit to deploy to a foreign land …