Buddie, the mascot for the pro-marijuana legalization group ResponsibleOhio, waits on a sidewalk to greet passing college students during a promotional tour at Miami University of Ohio last month. John Minchillo/AP hide caption

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Health and Human Services Secretary Sylvia M. Burwell says she's willing to work with Texas leaders to craft a unique Medicaid plan for the state. Kevin Dietsch/UPI/Landov hide caption

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This undated photo provided by the Harris County Sheriff's Office on Saturday shows Shannon J. Miles. Prosecutors in Texas are charging the 30-year-old man with capital murder in the killing of Darren Goforth, a sheriff's deputy who was gunned down from behind while filling up his patrol car at a suburban Houston gas station. AP hide caption

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New Orleans Mayor Mitch Landrieu speaks about New Orleans' emergence as a model of urban renewal and economic recovery 10 years after Hurricane Katrina during a visit Tuesday to the National Press Club in Washington, D.C. Mandel Ngan/AFP/Getty Images hide caption

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Houston firefighters learn to use a video chat program that will let them consult with an emergency medicine doctor while responding to 911 calls. Courtesy of Houston Fire Department hide caption

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Workers walk inside the LyondellBasell oil refinery in Houston in 2013. Lower oil prices are stoking fears of an economic decline in the region. Donna Carson/Reuters/Corbis hide caption

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The sign tells the story: Houston's Astrodome on Tuesday. Pat Sullivan/AP hide caption

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