bill foege. as a young medical missionary working in nigeria, bill helped develop a vaccination strategy that would later be used to eliminate smallpox from the face of the earth. and when that war was won, he moved on to other diseases, always trying to figure out what works. in one remote nigerian village, after vaccinating 2,000 people in a single day, bill asked the local chief how he had gotten so many people to show up. and the chief explained that he had told everyone to come see -- to "come to the village and see the tallest man in the world." today, that world owes that really tall man a great debt of gratitude. on the morning that john glenn blasted off into space, america stood still. and for half an hour, the phones stopped ringing in chicago police headquarters, and new york subway drivers offered a play-by-play account over the loudspeakers. president kennedy interrupted a breakfast with congressional leaders and joined 100 million tv viewers to hear the famous words, "godspeed, john