 Airplane builder Boeing is announcing plans to acquire a key supplier, Spirit Aerosystems, for $4.7 billion. The company says it's a move aimed at improving plane quality and safety. Boeing owned Spirit previously, and the move to reacquire the company would reverse the company's strategy of outsourcing to build its planes. Approaches come under criticism after some high-profile failures, including the most recently blowout of a panel in a 737 jet. I'm Jack Spear, NPR News.