Education

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Aminata Ba, wipes away tears as she is reunited with her son and daughter, 10, and 7 after a lockdown in response to a shooting in the parking lot of Liberty Elementary, just minutes before the students there were to be dismissed on Thursday, April 10, 2014 in Columbus, Ohio. (AP Photo/Columbus Dispatch, Courtney Hergesheimer)

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Students and parents are reunited after a lock down in response to a shooting in the parking lot of Liberty Elementary, just minutes before the students there were to be dismissed, Thursday, April 10, 2014 in Columbus, Ohio. (AP Photo/Columbus Dispatch, Courtney Hergesheimer)

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Students and parents are reunited after a lockdown in response to a shooting in the parking lot of Liberty Elementary. The lock down happened just minutes before the students there were to be dismissed, Thursday, April 10, 2014 in Columbus, Ohio. (AP Photo/Columbus Dispatch, Courtney Hergesheimer)

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Union players salute their fans following an NCAA men's college hockey Frozen Four tournament semifinal against Boston College, Thursday, April 10, 2014, in Philadelphia. Union won 5-4. (AP Photo/Chris Szagola)

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Union's Colin Stevens, left, celebrates the win with Daniel Ciampini, right, following the third period of an NCAA men's college hockey Frozen Four tournament game against Boston College, Thursday, April 10, 2014, in Philadelphia. Union College won 5-4. (AP Photo/Chris Szagola)

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Union's Mat Bodie reacts to his goal during the second period of an NCAA men's college hockey Frozen Four tournament game against Boston College, Thursday, April 10, 2014, in Philadelphia. (AP Photo/Chris Szagola)

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Union's Mat Bodie shoots the puck during the second period of an NCAA men's college hockey Frozen Four tournament game against Boston College, Thursday, April 10, 2014, in Philadelphia. (AP Photo/Chris Szagola)

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Union's Daniel Ciampini, right, shoots the puck past Boston College's Thatcher Demko for a goal during the second period of an NCAA men's college hockey Frozen Four tournament semifinal, Thursday, April 10, 2014, in Philadelphia. (AP Photo/Chris Szagola)

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Boston College's Johnny Gaudreau, center, tips the puck past Union's Colin Stevens, right, for a goal during the first period of an NCAA men's college hockey Frozen Four tournament semifinal, Thursday, April 10, 2014, in Philadelphia. (AP Photo/Chris Szagola)

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Union's Mike Vecchione, top, leaps into the arms of Sebastien Gingras, center, after scoring a goal with Nick Cruice, bottom, approaching during the third period of an NCAA men's college hockey Frozen Four tournament game against Boston College, Thursday, April 10, 2014, in Philadelphia. Union College won 5-4. (AP Photo/Chris Szagola)