Molecular biologist Randy Sheckman, who shared the 2013 Nobel Prize in physiology or medicine, acknowledges applause after receiving his prize during the ceremony in Stockholm last December. Pascal Le Segretain/Getty Images hide caption

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Dr. Bruce Ribner, medical director of Emory University Hospital's infectious disease unit, embraces Dr. Kent Brantly (left) who was treated with an experimental Ebola medicine and released from the Atlanta hospital Thursday. John Bazemore/AP hide caption

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Walt Whitman High School's Caroline Schweitzer runs through a host of Severna Park High School defenders during a semifinal game in Maryland's Class 4A/3A lacrosse tournament in May. Toni L. Sandys/The Washington Post/Getty Images hide caption

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