Key TakeawaysLockheed Martin beat analysts' revenue and profit expectations when it posted second-quarter earnings Tuesday.The company also raised its full-year guidance.Lockheed Martin Chief Executive Officer (CEO) Jim Taiclet touted the defense and aerospace contractor's $160 billion order backlog. Lockheed Martin (LMT) surpassed analysts' expectations with its second-quarter results Tuesday and raised its full-year outlook, sending shares higher. The defense and aerospace contractor lifted its full-year ...