Joe Biden has a light-hearted moment in the Old Senate Chambers in January. The vice president has not ruled out running for president in 2016. Cliff Owen/AP hide caption

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For years, sports broadcasts were a staple of AM radio. But now, AM seems to be mostly a mix of talk shows and infomercials, and the Federal Communications Commission wants the band to be relevant again. Doug Pensinger/Getty Images hide caption

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The limousine carrying President John F. Kennedy races toward the hospital after he was shot in Dallas on Nov. 22, 1963, with Secret Service agent Clint Hill riding on the back. Justin Newman/AP hide caption

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Health and Human Services Secretary Kathleen Sebelius speaks Thursday in Phoenix. Laura Segall/Getty Images hide caption

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