This Monday, March 28, President Obama defended his decision to join the allied forces in Libya and clarified that US involvement would be limited and supporting. By the next day, according to the Pentagon, "the United States had fired all but 7 of the 214 cruise missiles used in the conflict and flown 1,103 sorties compared to 669 for all other allies combined," Reuters reports. "It also dropped 455 of the first 600 bombs."
The Associated Press notes that this Saturday the US is expected to divert the rest of the military effort to other NATO countries. But, as the New York Post's Michael Goodwin points out, "In truth, there is no NATO without the US," so it hardly seems like these numbers will stay the same as long as the coalition is present in Libya.