. >>> gerardo rivera opens al capone's vault live on tv.it to sigh what lies behind the bricks. at shell, we believe the world needs a broader mix of energies, to move, to keep warm, to make clay piggies. that's why we are supplying natural gas, to generate cleaner electricity, that has around 50% fewer co2 emissions than coal. let's broaden the world's energy mix, let's go. >>> before his arrest, al capone ran much of his empire out of the lexington ington hotel in chicago. during a clean up, they found tunnels. gerardo rivera held a show on tv. >> reporter: under flood lights amidst a flurry of activity with thousands of viewers watching from all over the world. the much heralded al capone vault was blasted open. unfortunately the bomb blast was just a big bust. there was no treasure and no bones and no secrets just a wall. some viewers thought it was a scam. they believed it was known all along that the vaults would be empty. but the show's producers find it regrettable that anybody could entertain such thoughts. >> there was really no w