under fire for what critics say are dangerous gaps in the system. current and former pilots tell us the level of psychological screening for pilots around the world is random and depends on the airline. he says his airline grilled him on his personality. >> do you like your mother, do you hate your mother, do you like your father, do you hate your father. do you abuse small animals? >> reporter: he says some airlines interview a pilot's friends to see if they've got psychological or emotional issues. but government regulations are not as strict. the faa says pilots can't fly if they have bipolar or similar problems. faa rules say that pilots have to under go a medical exam every year or six months. he says those examines don't place a heavy emphasis on psychological screening. forensic psychiatrist lisa van sus tren says that doesn't cut it. >> if the screening is merely adequate and they're lumping psychological screening in with medical screening, is it possible to dupe the screener?