By Benjamin Zhang and Mike Nudelman
Ever look out the window of a plane or watch as it pulls up to the gate?
Have you ever wondered why some planes have pointy bits at the ends of the wings?
Boeing is a US multinational aerospace and defence group, which was founded in 1916 by William Boeing. The company merged with McDonnell Douglas in 1997, and its business units include Boeing Commercial Airplanes (BCA); Boeing Defense, Space & Security (BDS); Engineering, Operations & Technology; Boeing Capital; and Boeing Shared Services Group.