Sales of military aerospace products during the first quarter of 2002 served as a cushion against decreased sales of commercial aircraft in the wake of last September's terrorist attacks and the ensuing war in Afghanistan, senior Boeing officials said yesterday. "Commercial Airplanes continues to aggressively implement lean manufacturing to maximize efficiency through the down-cycle, and Military Aircraft and Missile Systems again turned in excellent program performance," Boeing Chief Executive Officer Phil Condit told investment analysts during an April 17 conference...