David Letterman’s Anti-Fracking Rant – Business Insiderby Genevieve WeynerowskiJuly 24, 2012July 24, 2012David Letterman’s Anti-Fracking Rant – Business Insider. Tags:David Lettermanfracking Leave a Reply Cancel replyYour email address will not be published.Comment Name Email Website Save my name, email, and website in this browser for the next time I comment.