** FILE ** Sen. Johnny Isakson, R-Ga., speaks during a news conference at the State Capitol in Atlanta, May 13, 2005. Isakson won assurances Thursday, Nov. 10, 2005, that the Environmental Protection Agency will quickly review Atlanta's appeal of a rule requiring the city to use reformulated gasoline, which its officials claim makes area skies dirtier. But under questioning from Isakson, an EPA assistant administrator said there are limits to the flexibility the agency can give the city under current air quality standards. (AP Photo/John Amis, File)