Maybe the more you know--the more you dwell on the possibilites of trouble. When I didnt fly for a period of 4-5-6 months I used to worry but if I flew monthly or more it didnt worry me so much. Also other worrys and concerns seem to overshadow the flight worrys - all the travel worrys in total are substantial today. I wish your friend a successful reentry into the skys DZ