Eye Opener: Stabbing rampage stuns Pennsylvania community

      |A 16-year-old student has been charged with the stabbing of 22 people at a Pennsylvania high school. Also, in the search for Flight 370, searchers have detected an underwater signal in the same part of the Indian Ocean where sounds were detected earlier. All that, and all that matters, in today's "Eye Opener." Your world in 90 seconds.

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