Article Photos: Oklahoma pork producers are on alert 3/4

 Dr.  Richard  Besser Acting Director Center for Disease Control and Prevention speaks in the White House Press Briefing Room during a news conference to discuss reported Swine Flu outbreaks, Sunday, April 26, 2009 in Washington. The U.S. is declaring a public health emergency to deal with the emerging new swine flu. (AP Photo/Pablo Martinez Monsivais)