our interview with burton malkiel, author of the best- selling "a random walk down wall street". >> tom: citing missteps, poor communication, and systemic failures, president obama's oil spill commission lays the blame for last year's gulf oil disaster on lax industry management. that drew a sharp response from the industry's largest player, exxon mobil, which was not involved in the gulf disaster. c.e.o. rex tillerson said the commission did not investigate the entire industry and ignored years of good performance. for more on the safety of deepwater drilling, washington bureau chief darren gersh spoke with the oil commission's co-chair, william reilly. >> thank you very much, for your time, i appreciate it. >> your report concludes the bp oil spill was avoidable, why? >> well, if you look at the sequence of decisions that lead up to the explosion, the blowout, there were any 23478 of them that are difficult to explain and just plane wrong. if those had not been made, many of them the way they were, a negative pressure test that was judged a success but was clearly not, and they had ev