dr. tilton mentioned the resources that the faa has to calculate out radiation doses that wally friedman did. that's called, it's available on the website, and i know alpa and the associations have folks are looking at radiation issues. also the white paper that he mentioned earlier looks at possibly asking the airlines with monitoring radiation dosages, much like a radiation, radiation type worker would wear a dosimeter. for the individual pilot though those answers are not satisfactory. so we are confronted with a situation where people may ask us about what to do. the person who is at highest risk is the pregnant pilot in her first trimester. and that's an individual decision about whether she should fly or not, there are certain strategies we recommend that people would take if they would elect to continue to fly. that woman should probably fly at the lower latitudes because of the greater shielding from the ozone. and also fly lower altitudes to get more protection. so the short duration flights in the southern latitudes would be a significantly lower radiation exposure than someone