ATF agents search last week for evidence at the site of the fire and explosion in West, Texas. Tom Reel/The San Antonio Express-News/AP hide caption

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An investigator inspects the area near a surveillance camera on the roof of the Lord & Taylor store near the Boston Marathon finish line on Thursday. That camera provided the first glimpse of the men who allegedly planted the bombs. Julio Cortez/AP hide caption

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Tom Perez, President Obama's nominee to lead the Labor Department, has been an aggressive advocate for civil rights. Jewel Samad/AFP/Getty Images hide caption

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FBI Director Robert Mueller is set to leave office this year. Whomever President Obama chooses to replace him could become a big part of Obama's legacy. Susan Walsh/AP hide caption

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President Obama last month withdrew the nomination of Caitlin J. Halligan to the federal appeals court in Washington, D.C., after her nomination was blocked by Senate Republicans. Jim McKnight/AP hide caption

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While equal rights occupy a large part of the debate over same-sex marriage, federal taxes are also a concern for gay couples. Experts say repealing the Defense of Marriage Act will affect some same-sex couples when they file their taxes. hide caption

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