An illustration of Boeing's combat-ready KC-7A7 family of tankers. Boeing and some defense analysts say Northrop Grumman is posturing to pressure the Pentagon for more favorable terms. Illustration by Chuck Schroeder/The Boeing Co. hide caption

itoggle caption Illustration by Chuck Schroeder/The Boeing Co.

St. Bernard Parish (shown Feb. 23, 2006) languished until recently — and now that residents are rebuilding, there's controversy over low-income rentals. Alex Brandon/AP hide caption

itoggle caption Alex Brandon/AP

Construction crews work on a new home built by the Make it Right Foundation in New Orleans' Lower Ninth Ward, May 2009. More than four years after Hurricane Katrina, much of the city remains in survival mode. Mario Tama/Getty Images hide caption

itoggle caption Mario Tama/Getty Images

The inventor of the electronic cigarette, Hon Lik smokes his invention in Beiijng on May 25, 2009. Also known as an 'e-cigarette', the battery-powered device is designed as an alternative to cigarettes, cigars and pipes, and provides inhaled doses of nicotine by delivering a vaporized propylene glycol/nicotine solution, while also providing the physical sensation and flavors similar to inhaled tobacco smoke. Frederic J. Brown/AFP/Getty Images hide caption

itoggle caption Frederic J. Brown/AFP/Getty Images