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 …

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.

Report: 2 escorted off Boston plane  —  Officials in Boston are taking no chances, a day after the tragedy at the Boston Marathon — including on flights out of nearby Logan Airport.  —  A plane headed to Chicago was brought back to the gate at Logan Airport, after some passengers …

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.

FBI grills Saudi man in Boston bombings  —  ‘Smells of gunpowder’  —  An FBI investigator examines a bag inside an apartment in Revere, in a building on the street where a man being questioned in the bomb attack lives.  —  Police took a 20-year-old Saudi national into custody near the scene …

After Boston, Congressman Urges Caution on Immigration Reform  —  Representative Steve King of Iowa, a prominent House conservative, says Congress should be cautious about rushing immigration reform, especially after Monday's bombing in Boston, where three people were killed.

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 …

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.

Does High Public Debt Consistently Stifle Economic Growth?  A Critique of Reinhart and Rogof  —  Abstract:  —  Herndon, Ash and Pollin replicate Reinhart and Rogoff(2010a and 2010b) and find that coding errors, selective exclusion of available data, and unconventional weighting …

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 …