People line up to enter the Supreme Court on Monday for arguments. Mark Wilson/Getty Images hide caption

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Nigerian widow Esther Kiobel, a plaintiff in Kiobel v. Royal Dutch Petroleum, cries as she speaks outside the Supreme Court in October 2012. Carolyn Kaster/AP hide caption

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This October 2011 photo provided by Melanie Capobianco shows her adoptive daughter, Veronica, trick-or-treating in Charleston, S.C. The child has been the focus of a custody battle between her adoptive parents and her birth father. Courtesy of Melanie Capobianco/AP hide caption

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This October 2011 photo provided by Melanie Capobianco shows her adoptive daughter, Veronica, trick-or-treating in Charleston, S.C. The child has been the focus of a custody battle between her adoptive parents and her birth father. Courtesy of Melanie Capobianco/AP hide caption

itoggle caption Courtesy of Melanie Capobianco/AP

Medical geneticist Dr. Harry Ostrer (center) talks to the press outside the U.S. Supreme Court on Monday. The court heard oral arguments on the highly charged question of whether human genes can be patented. Mladen Antonov/AFP/Getty Images hide caption

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This artist rendering shows Paul Clement (second from left) with Solicitor General Donald B. Verrilli Jr. (seated, right), addressing the Supreme Court on Wednesday. Justices pictured are (from left) Sonia Sotomayor, Stephen Breyer, Clarence Thomas, Antonin Scalia, Chief Justice John Roberts, Anthony Kennedy, Ruth Bader Ginsburg, Samuel Alito and Elena Kagan. Dana Verkouteren/AP hide caption

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A pro-gay-marriage protester stands in front of the Supreme Court on Tuesday, the first of two days of oral arguments on challenges to laws that limit the definition of marriage to unions of a man and a woman. Karen Bleier/AFP/Getty Images hide caption

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People file into the Supreme Court on Tuesday for the court's hearing on California's Proposition 8, a voter-approved ban on same-sex marriage. Pablo Martinez Monsivais/AP hide caption

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Snow covers flowers in front of the Supreme Court building on Monday in Washington, D.C. On Tuesday, the justices hear oral arguments on the constitutionality of California's Proposition 8, which banned gay marriage. Jonathan Ernst/Reuters /Landov hide caption

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A scene outside the Supreme Court on Monday, as the justices announced they would hear another case involving affirmative action in higher education. Many of those waiting in line at the court in a late-season snowfall were hoping to attend oral arguments on gay-marriage cases being heard Tuesday and Wednesday. Jose Luis Magana/AP hide caption

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