April 13, 2010 12:08 am From Vandal to Artist Hard-core graffiti artist Joel Mambru had a gift, but it was only being showed through tagging. Thanks to the help of teacher David Gonzalez, Mambru went from being a street punk to a genuine artist. US & World Videos 1:30 NJ man is riding his bike 1100 miles to promote cardiovascular exercise to overcome heart disease 2:35 Workers describe the chaos after deadly workplace shooting left 2 dead, 3 hurt in Chester 0:28 14-year-old boy shot by another teen while playing with a gun 4:54 The history of the Benjamin Franklin Parkway and how it was inspired by Paris' Champs-Élysées 2:17 ‘Food has been an integral part my life': Local chef nominated for another James Beard award