Anthony Shadid, who died Feb. 16, was a foreign correspondent for The New York Times based in Baghdad and Beirut. He won a Pulitzer Prize twice, in 2004 and 2010. Nada Bakri/Courtesy Houghton Mifflin Harcourt hide caption

A camera is used instead of a rearview mirror on the Toyota NS4 plug-in hybrid concept car at the North American International Auto Show in Detroit on Jan. 10. Mike Cassese/Reuters/Landov hide caption

Bob Davis fills up his airport shuttle van at a natural gas pumping station in College Park, Ga. A growing number of companies are considering converting their vehicle fleets to natural gas. David Goldman/AP hide caption

Prime Minister Vladimir Putin delivers a campaign speech during a rally of his supporters in Moscow, Feb. 23. Putin is mounting a vigorous campaign in the face of growing opposition but is expected to win Sunday's presidential elections. Yuri Kadobnov/AFP/Getty Images hide caption

Larry Hall shows off the old vents and 9-foot-thick walls of a missile silo he's developing into condominiums. Frank Morris hide caption

Before he was three years old, Grant Coursey underwent several surgeries for a cancerous tumor. The Coursey Family hide caption

A Malaysian customs official examines elephant tusks at a port in Kalang. Malaysia has become an ivory transit hub, with African elephant tusks bound for China. Worldwide, authorities seized more than 5,000 smuggled tusks. AFP/Getty Images hide caption

Richard Diebenkorn's 1975 work Ocean Park #79, features pastel blues, lavenders and aquas — and thin strips of deep red and green at the top to draw the viewer's gaze upward. The Estate of Richard Diebenkorn/Courtesy Philadelphia Museum of Art hide caption