May 18, 2013 11:29 PM EDT
• 'We could lose everything': Tea Party groups prepare to sue IRS
• Probe begins after Connecticut commuter train collision injures 60, 5 critically
• Autopsy confirms body found is that of missing California veteran
• Marine reunited with dog he handled in Afghanistan in surprise ceremony
• Veterans from World War II carrier hold final reunion
• South Korea says North Korea fires 3 short-range missiles
• Powerball at an estimated $600 million as jackpot continues to grow
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