roy dalthorp. >> right. it's interesting, drew. so much in medicine is predicated on lessons learned. that's how you build knowledge. stick around and listen to this. kevin o'shea, the physician in charge of bp's medical response in the gulf, he told me that of the four states more than 1,500 workers have complained of some illness or injury. he isn't aware of any significant respiratory illnesses as of yet. as a doctor, i was curious, what is bp doing to monitor possible long-term health effects from the cleanup? are they taking blood samples that will allow them to track changes in liver or kidney function in workers using corexit, which isn't even used in europe because it's considered too toxic. if someone has been out there, and you've heard these complaints, i'm sure, like i have. they complain of burning in