Guest: Robert Cooke.

Today on Focus, we'll chronicle the life and discoveries of one of the most significant medical figures of our time. Dr. Judah Folkman was the first to hypothesize treatment of cancerous tumors with angiogenesis inhibitors—medicine that would prevent new blood vessels from forming to "feed" the tumor. Today on the show, we're joined by science writer Robert Cooke, the doctor and scientist's biographer and the author of Dr. Folkman's War.