Bomb Details Emerge in Boston Case  —  BOSTON — The explosives used to kill three people and injure 176 at the Boston Marathon on Monday were likely some kind of “pressure-cooker” devices that sent sharp bits of shrapnel flying into victims in the vicinity of the blast, several law enforcement officials said Tuesday.

Injured Saudi is a witness, not a suspect, in Boston bombing  —  U.S. law enforcement officials said Tuesday that a Saudi national injured in the Boston Marathon bombing is regarded as a witness, not a suspect.  —  The Saudi, who is recuperating at a Boston hospital, is in his 20s …

Jack Kingston urged Guard ‘take a pass’ on Boston Marathon  —  A year ago, Rep. Jack Kingston was so concerned about the National Guard's shriveling budget that he wanted it to “take a pass” on major events like “the Boston Marathon.”  —  The Georgia Republican pleaded with the guard's leaders …

PHOTOS of SAUDI NATIONAL Person of Interest in Boston Custody ...Update: Saudi Ruled Out as Suspect  —  Here is the Facebook page of the Saudi national guarded by federal agents at a Boston hospital.  —  Abdulrahman Ali Alharbi  —  The name was released by Townhall and Free Republic.

An Al-Shabaab Link to Boston Marathon Bombings?  —  A series of Twitter gloats today raised questions about the possible involvement of Somali terror group Al-Shabaab in the Boston Marathon bombing.  —  No person or group has yet directly taken responsibility for the attack that killed three and wounded 176, 17 of those critically.

Is The Reinhart-Rogoff Result Based on a Simple Spreadsheet Error?  —  So this is huge.  Or, rather, it won't matter even a tiny little bit but it ought to be a big deal anyway.  You've probably heard that countries with a high debt:GDP ratio suffer from slow economic growth.

Obama's snub to Thatcher: President won't send envoy to funeral - and leaves it to her old allies from the Reagan era  — President Obama made decision not to send a member of his administration before yesterday's bombings in Boston  — Instead, Reagan's former Secretary of State George Shultz …

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.