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A variant of the F-35 Joint Strike Fighter, the F-35C, in a test flight.

 

来源：http://www.nytimes.com/2011/02/17/us/politics/17-f-35-engine.html?_r=1&nl=us&emc=politicsemailema1

House Votes to End Alternate Jet Engine P...

 

 

Drew Angerer/The New York Times

President Obama and his wife, Michelle, greeted President Hu Jintao of China at the White House for Wednesday's state dinner.

来源：

http://www.nytimes.com/2011/01/20/world/asia/20prexy.html?_r=...