>> with all the cell phone use increasing, brain cancer is not increasing, so i am not surprised to find that the largest study so far is not showing a connection. one significant weak weakness, is it didn't show for people that were heavy users. >> harris: critics also say the study did not examine long-term risks they know brain tumors can take decades to develop. an update on that terrible air race crash in reno, nevada last month. 11 people died, more than 70 others hurt in that modified jet took a nose dive in the crowd. federal investigators saying they found no readable on board video from that wreckage. the debris scattered more than two acres across, but technicians with the national transportation safety board still trying to recover information from the aircraft's data memory card. investigators saying it could take months to complete the final work. i'm harris faulkner in for