Florida's Gov. Rick Scott, seen here speaking at the Conservative Political Action Conference in Washington last month, says of Medicaid, "It is absolutely not sustainable. If we do nothing, this line will bankrupt our state." J. Scott Applewhite/AP hide caption

Young-min Kwon of Massachusetts General Hospital holds the metal-alloy ball of Susy Mansfield's faulty artificial hip joint. The yellowish tissue on top is dead muscle caused by a reaction to the metal debris produced by the defective hip implant. Richard Knox/NPR hide caption

JBI CEO John Bordynuik holds a jar of No. 6 fuel oil, derived from discarded plastic like that seen on a conveyor belt at his plant. Daniel Robison/WNED hide caption

A technician places a fertilized human egg in a test tube. New technology has led to new legal questions: What happens to survivors benefits when a baby is conceived after a father's death? Rich Frishman/Getty Images hide caption

Policemen shout slogans during a demonstration of Greek security forces against the new austerity measures in Athens. Aris Messinis /AFP/Getty Images hide caption

Jesse Cohen and Eric Emm of Tanlines. Courtesy of the artist hide caption

Rep. Jesse Jackson Jr. and his wife, Chicago alderman Sandi Jackson, ask each other for their support and votes as they arrive at a polling station for early voting in Chicago on March 9. M. Spencer Green/AP hide caption

George Lois, pictured above in the early 1960s, was a pioneer during the "Creative Revolution" of American advertising. Courtesy Phaidon Press hide caption