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  • Obama picks up more superdelegates  The campaign for Sen. Barack Obama today announced the support of four new superdelegates -- including a previous backer of Sen. Hillary Clinton. The latest announcements narrow Clinton's lead in superdelegates to single digits. At the year's start, she led by more than 100 superdelegates.

  • Train quarantined after woman dies Read full story for latest details.

  • U.N. 'furious' as Myanmar seizes food The United Nations' top World Food Program official says he is "furious" over the Myanmar's government's refusal to allow the organization to distribute aid that was flown in for cyclone disaster victims. Future flights have been suspended.

  • Physics wonder boy to test Einstein theories  Arkani-Hamed is only in his mid-30s, but he has already distinguished himself as one of the leading thinkers in the field of particle physics. His revolutionary ideas about the way the universe works will finally be put to the test at Switzerland's Large Hadron Collider.

  • Wounded vets ditch wheelchairs for Segways Thanks to a nonprofit group, amputees wounded in war are getting around not in wheelchairs but in Segways. The advantages, they say, are they can move about in an upright position and people no longer look down on them.

  • Bush tries on new role: Father of the bride President Bush briefly previewed the new role he'll be taking on Saturday: father of the bride.

  • Your moms: Beautiful, fantastic, perpendicular We've sent the card, ordered the flowers for Mother's Day -- and we may even plan to call her. But if you had to describe everything your mom means to you in a single word -- what would it be? That's the assignment these iReporters accepted. Listen to what word they chose.

  • 'I was gonna blow myself away' "We were a normal red-blooded American family," recalls Rudy Aguilar. "And ... it took [one day] to wipe us out."

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