A pedestrian walks through the intersection of Tenth and Cherry streets in downtown Columbia, Missouri, Tuesday, Feb. 1, 2011. Layers of dangerous ice and blowing snow closed roads and airports from Texas to Rhode Island on Tuesday as a monster storm began bearing down on the nation. (AP Photo/The Columbia Daily Tribune, Joshua A. Bickel)

A pedestrian walks through the intersection of Tenth and Cherry streets in downtown Columbia, Missouri, Tuesday, Feb. 1, 2011. Layers of dangerous ice and blowing snow closed roads and airports from Texas to Rhode Island on Tuesday as a monster storm began bearing down on the nation. (AP Photo/The Columbia Daily Tribune, Joshua A. Bickel)

One of five eight-week-old Mexican Gray wolf pups gets a quick check-up at the Endangered Wolf Center, Thursday, July 1, 2010 in Eureka, Missouri. The pups will eventually be re-introduced into the wild in the southwest United States. (AP Photo/Tom Gannam) Read more →

One of five eight-week-old Mexican Gray wolf pups gets a quick check-up at the Endangered Wolf Center, Thursday, July 1, 2010 in Eureka, Missouri. The pups will eventually be re-introduced into the wild in the southwest United States. (AP Photo/Tom Gannam)

Read more →