Philadelphia

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New Philadelphia Flyers general manager Ron Hextall laughs during an NHL hockey news conference, Wednesday, May 7, 2014, in Philadelphia. Hextall is Philadelphia's all-time winningest goalie and served as assistant GM last year before being promoted. He replaces Paul Holmgren who was elevated to president. (AP Photo/Matt Slocum)

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An Amur tiger walks across a passageway after a news conference at the Philadelphia Zoo, Wednesday, May 7, 2014, in Philadelphia. The see-through mesh pathway called Big Cat Crossing is part of a national trend called animal rotation that zoos use to enrich the experience of both creatures and guests. (AP Photo/Matt Slocum)

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An Amur tiger walks across a passageway after a news conference at the Philadelphia Zoo, Wednesday, May 7, 2014, in Philadelphia. The see-through mesh pathway called Big Cat Crossing is part of a national trend called animal rotation that zoos use to enrich the experience of both creatures and guests. (AP Photo/Matt Slocum)

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Amur tigers walk across a passageway after a new conference at the Philadelphia Zoo, Wednesday, May 7, 2014, in Philadelphia. The see-through mesh pathway called Big Cat Crossing is part of a national trend called animal rotation that zoos use to enrich the experience of both creatures and guests. (AP Photo/Matt Slocum)

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An Amur tiger walks across a passageway after a news conference at the Philadelphia Zoo, Wednesday, May 7, 2014, in Philadelphia. The see-through mesh pathway called Big Cat Crossing is part of a national trend called animal rotation that zoos use to enrich the experience of both creatures and guests. (AP Photo/Matt Slocum)

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An Amur tiger walks across a passageway after a news conference at the Philadelphia Zoo, Wednesday, May 7, 2014, in Philadelphia. The see-through mesh pathway called Big Cat Crossing is part of a national trend called animal rotation that zoos use to enrich the experience of both creatures and guests. (AP Photo/Matt Slocum)

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Toronto Blue Jays' Jose Bautista, right, slides into third as Philadelphia Phillies third baseman Cody Asche catches the throw after Bautista advanced on a single by Edwin Encarnacion during the fourth inning of a baseball game, Tuesday, May 6, 2014, in Philadelphia. (AP Photo/Matt Slocum)

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Toronto Blue Jays' Colby Rasmus, left, and Juan Francisco, right, celebrate past Philadelphia Phillies catcher Carlos Ruiz after Rasmus' two-run home run during the fourth inning of a baseball game, Tuesday, May 6, 2014, in Philadelphia. (AP Photo/Matt Slocum)