David Wilkerson was just a young preacher in the Pennsylvania hills when he was stunned by a new calling from God: go to New York City to speak to seven young gang members on trial for murder.

But something much greater was to come. Once in New York, David was inspired to stay for a lifetime of helping troubled teenagers get free of drugs and crime. With the word of God in his ears, he founded an inner-city ministry still known as the Teen Challenge to change their paths and alter thousands of lives forever.