Supreme Court Justice Sonia Sotomayor grilled lawyers arguing the constitutionality of new lethal-injection cocktails. Win McNamee/Getty Images hide caption

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Bottles of the sedative midazolam at a hospital pharmacy in Oklahoma City. AP hide caption

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Michelle McKelvey (left) and Meg McKelvey sit near demonstrators outside of the Supreme Court on Tuesday. They have been together for two years. Emily Jan/NPR hide caption

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The stack of amicus briefs filed as of April 9 reached past the knee of NPR legal affairs intern Anthony Palmer. The briefs cost, on average, an estimated $25,000 to $50,000. Emily Jan/NPR hide caption

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Protesters hold a pro-gay-rights flag outside the US Supreme Court on Saturday, countering the demonstrators who attended the March For Marriage in Washington, D.C. The Supreme Court meets on Tuesday to hear arguments over whether same-sex couples have a constitutional right to wed in the United States, with a final decision expected in June. Paul J. Richards/AFP/Getty Images hide caption

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Chief Justice John Roberts (from left) and Justices Anthony M. Kennedy, Ruth Bader Ginsburg, Stephen G. Breyer and Sonia Sotomayor at the State of the Union address earlier this year. Mandel Ngan/AP hide caption

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Jayne Rowse (left) and April DeBoer with their four children, Jacob (from left), Rylee, Nolan and Ryanne at a news conference in March. Valerie Macon/Getty Images hide caption

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Maria Altmann fought her way to the U.S. Supreme Court to force the Austrian government to give back this painting by Gustav Klimt of her aunt, Adele Bloch-Bauer. DeAgostini/Getty Images hide caption

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Steam from a coal-fired power plant is silhouetted against the sun near St. Marys, Kan. Industry groups say there should be a far more aggressive consideration of costs of regulation than the Obama administration took into account. Charlie Riedel/AP hide caption

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R. James George Jr., attorney for Sons of Confederate Veterans, meets with reporters outside the Supreme Court Monday. Molly Riley/AP hide caption

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The design of a license plate proposed by the Sons of Confederate Veterans. AP/Texas Department of Motor Vehicles hide caption

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