Aerojet Rocketdyne executives may attract more attention than usual this week at an annual Air Force space conference in Maryland. Though it has been in the rocket business since 1942, Aerojet Rocketdyne (NYSE: AJRD) has usually been a quiet and steady subcontractor in the defense business. That changed earlier this summer when the Rancho Cordova-based company reportedly made a $2 billion cash bid to buy United Launch Alliance. Known as ULA, the Denver-based joint venture of Boeing Co. (NYSE: BA)...