Top Stories: Texas Blast; Boston Investigation

Good morning.

Our early headlines:

-- Texas Fertilizer Plant Blast Killed Several, Injured Dozens

-- Boston Marathon Explosions: Thursday's Developments

-- Ricin Suspect Described As Conspiracist, Elvis Impersonator

-- Jobless Claims Rose Slightly Last Week

-- Book News: Vast 'Digital Public Library Of America' Opens Today

Other stories making headlines:

-- "North Korea Sets Conditions For Return To Talks." ( The New York Times)

-- "Musharraf Flees Pakistan Court As Judges Order His Arrest." ( The Globe and Mail)

-- "I'm Furious," Former Rep. Gabrielle Giffords (D-Ariz.) Writes After Gun Bills Fail In Senate. ( The New York Times)

-- "After Gun Defeat, Where Does Obama Go From Here?" ( Roll Call)

-- "Obama Uses And Loses Political Capital On Gun Control." ( It's All Politics)

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