People shoot their guns at a shooting range near the Crossroads of the West Gun Show in Tucson, Ariz., on Jan. 15. Kevork Djansezian/Getty Images hide caption

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Tom Gillian uses a snow shovel to chip ice from his windshield in Denver on Monday. A monster winter storm is revving up in the Rockies and is expected to drop up to 2 feet of snow in some parts of the Midwest and an inch of ice in others. Ed Andrieski/AP hide caption

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Motorists navigate the morning rush hour in Chicago. Ford and other major automakers hope to install technology in cars that enables vehicles to communicate with one another to avoid crashes. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images