Major airlines had a mixed day, with Southwest closing in positive territory, United Continental and Delta relatively flat, and Jet Blue in the red.

FORBES: Second 787 Dreamliner Technical Glitch In As Many Days Sinks Boeing

The U.S. Navy, which uses Bubble Wrap to protect everything from jet parts to navigational equipment, likes the flat sheets because they occupy less space on its transport ships.

FORBES: Magazine Article

Despite signs of a weakening U.S. economy, aerospace component manufacturers are working flat out, machining turbine compressor blades, high-speed bearings and other parts for jet-engine and aircraftmakers.

FORBES: A Pewter Lining