Article updated: 3/6/2013 5:43 PM

Goodell: NFL ‘can and must’ make football safer

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NFL Commissioner Roger Goodell delivers the Department of Exercise and Sport Science's annual Carl Blyth Lecture at the University of North Carolina in Chapel Hill, N.C., Wednesday, March 6, 2013. (AP Photo/Gerry Broome)

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NFL Commissioner Roger Goodell says the league will continue to do "everything we can" to make football safer.