Celebrity personal trainer Daniel McKenna says pull-ups are "empowering." He explains how to go from a pull-up zero to hero.

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Pilot's Poor Decisions Blamed in Kobe Bryant Chopper Crash
Federal safety officials have blamed the helicopter crash that killed Kobe Bryant and eight others on board last year on the pilot’s poor decision to fly into clouds where he became disoriented and plunged into a Southern California hillside.
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