U.S. Agriculture Secretary Tom Vilsack speaks to members of the media about the upcoming wildfire season, during a news conference at the History Colorado Center, in Denver, Tuesday, May 20, 2014. The U.S. Forest Service says it is adding four aircraft to its firefighting fleet as California recovers from a spate of blazes and other fire-prone states brace for another hot, dry summer.(AP Photo/Brennan Linsley)