Aerospace and Defense Sector Braces for Potential Brain Drain As Cold War Workers Retire WASHINGTON (AP) -- The aerospace and defense sector is bracing for a potential brain drain over the next decade as a generation of Cold War scientists and engineers hits retirement age and not enough qualified young Americans seek to take their place. ADVERTISEMENT The problem -- almost 60 percent of U.S. aerospace workers in 2007 were 45 or older -- could affect national security and even close the door on commercial products that start out as military technology, industry officials said. While U.S. universities are awarding...