EXCLUSIVE PHOTOS: Boston Marathon bomb  —  The bomb that exploded at the finish line of Monday's Boston Marathon sent shock waves across the country.  Crime scene photos obtained exclusively by FOX 5 Atlanta are the first look at what is left of the first deadly device.

Sen. Manchin: Background Checks Won't Survive Today's Vote  —  Potential GOP supporters out front on immigration won't risk second battle with conservative base on guns, Manchin tells NBC News..  —  In this April 10, 2013 file photo, Sen. Joe Manchin, D-W.Va., left, and Sen. Patrick Toomey …

AP: Ex-wife says former SC Gov. Sanford trespassed  —  CHARLESTON, S.C. (AP) — A lawyer says ex-South Carolina Gov. Mark Sanford trespassed at his ex-wife's home and he has been ordered to appear in court two days after his special congressional election.  —  Documents acquired …

Researchers Finally Replicated Reinhart-Rogoff, and There Are Serious Problems.  —  In 2010, economists Carmen Reinhart and Kenneth Rogoff released a paper, “Growth in a Time of Debt.”  Their “main result is that...median growth rates for countries with public debt over 90 percent of GDP …

Letter sent to Roger Wicker tests positive for ricin  —  An envelope sent to the U.S. Senate office of Sen. Roger Wicker (R-Miss.) included a substance that has tested positive for Ricin, two sources say.  —  It was not immediately clear when the envelope was received.

How long until we know?  —  It's been more than 24 hours since the explosions in Boston.  But while new details emerge by the hour, the question on so many people's minds remains unanswered: Who did it?  —  “The range of suspects and motives remains wide open,” FBI Special Agent Richard DesLauriers said …

In Grisly Image, a Father Sees His Son  —  BOSTON — When Jeff Bauman woke up in a hospital bed on Tuesday, an air tube was down his throat, both of his legs had been amputated at the knee, and his father was by his side.  He tried to talk, but he could not.

IS THIS THE BOMBER?  Man With Black Backpack Before Bombing - Then Without Backpack Moments Before Blast  —  These photos from yesterday's marathon were forwarded to me from a trusted source and came from a Japanese Flickr account.  —  This photo here shows the Boston crowd before the bombing... And then after the bombing.

Senators formally file immigration bill  —  (CNN) — A bipartisan group of senators formally filed legislation early Wednesday calling for border security as the cornerstone of immigration reform.  —  The bill also would prevent undocumented immigrants from reaching full legal resident status until …