Lockheed Martin CEO commits to driving down F-35 fighter's costs

(Reuters) - Lockheed Martin Corp said its Chief Executive Marillyn Hewson gave U.S. President-elect Donald Trump a personal commitment to bring down the price of its F-35 fighter jet, after he heaped pressure on the aerospace company over the cost. Lockheed's shares fell on Friday after Trump's message on Twitter, and after he earlier tweeted that he had asked rival Boeing Co to "price-out" an older aircraft as an alternative. Hewson said in a statement tweeted by Lockheed that the company would