Leland Hartwell says he was sleeping when he got a call from work saying he won this year's Nobel Prize for medicine. He says, "It struck like a thunderbolt." Hartwell, who is director of the Fred Hutchinson Cancer Research Center in Seattle, will share the 943-thousand dollar prize with two British scientists. They're being honored for research on how cell development affects cancer. The Nobel committee says the research helps experts understand chromosome defects in cancer cells, and that it could lead to new cancer treatments. Hartwell shares the prize with R. Timothy Hunt and Paul Nurse of the Imperial Cancer Research Fund in England.