Sieber is out of the business of tabletopping the Olympics and refuses to talk specifically about Athens. But he brings up one of his 30-year-old scenarios, one that might give Greek organizers pause, especially in light of the dynamite and hand grenade discovered early this month buried next to the 1896 Olympic stadium, which is slated to be used as a venue in 2004. "[The Basque separatist group] ETA is very patient," Sieber says, his imagination vivid as ever. "They pick out a man they want to kill. They send one of their operatives, disguised as a worker, to the construction site for his new home and plant a bomb. For several years they do nothing. Then one morning, perhaps after he is married, with a family, they detonate it by radio. He finds himself up in the sky."