Croatia detects possible case of mad cow

Related: Mad Cow in the U.S.

1. Headlines
   1. Search for survivors: 48-hour window of opportunity

      Search teams, including some with trained dogs, are scouring the rubble left behind by the monster tornado that flattened miles of homes, schools and businesses in Oklahoma Monday. While it's uncertain exactly how many people are still missing, rescuers are up against the clock to find survivors, experts say.

   2. When school doesn't feel safe, facing facts helps
   3. Mystery illness strikes 7 in Ala.; 2 dead
   4. ICU culture affects when to pull the plug
   5. Okla. tornado injuries: Even the doctors are 'crying'
   6. Olive oil, nuts can protect your brain, study finds
   7. U.N.: H7N9 flu outbreak has cost $6.5 billion so far
2. Multimedia
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      Video
      For Oklahoma doctors and first responders, an emotional 24 hours
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      Video
      Parents call twins' separation surgery 'miracle' 
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      First responders ‘instrumental’ in rescue efforts
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      New guidelines have Asperger’s families worried