Potomac Institute for Policy Studies experts are warning that potential long-term health effects of the BP oil spill are both troubling and unclear.  Cleanup workers and Gulf Coast residents are reporting symptoms that include headaches and respiratory problems.  In a Los Angeles Times article, Center for Neurotechnology Studies Director Prof. James Giordano, PhD, says there is "overwhelming evidence" that compounds found in crude oil are dangerous, while Dr. Stephen Cunnion of the Institute's Center for Health Policy and Preparedness says more follow-up on individuals exposed to oil spills is needed.  Click here to read the full Los Angeles Times article.