thanks the patients, nurses, and physicians involved in opdivo clinical trials. finally tonight, the king leading a secret life away from throne. holding another job for more than two decades. here s david wright. reporter: klm royal dutch airlines. the crown, right there on the tail of the plane. and in the cockpit? the co-pilot has a crown of his own, too. this is the uniform of his day job. officially, his majesty willem-alexander, by the grace of god, king of the netherlands, prince of orange-nassau, et cetera, et cetera, et cetera. one of those etceteras, presumably, for the job he s