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The event, on Thursday night at the World Science Festival in Manhattan, was a panel discussion called “Cancer’s Last Stand? The Genome Solution.” The warm-up act was a video of brightly colored cells, ropes of DNA and other mystery blobs — gorgeous and ominous — floating to solemn, New-Agey music with lots of strings and poignant piano notes. Slides broke in bearing scary statistics — cancer kills more than half a million Americans a year, for example — and quotes from researchers: “Cancer is always genetic.” Cancer cells are “more perfect versions of ourselves.”

The panelists were Eric Lander, an expert in genome sequencing; Mary Claire King, the first scientist to identify genes that can cause breast cancer; Olufunmilayo Olopade, a medical oncologist and breast cancer researcher; and Siddhartha Mukherjee, an oncologist and researcher, and author of the Pulitzer prize-winning book "The Emperor of All Maladies: A Biography of Cancer." The moderator was Dr. Richard Besser, a physician who is chief health and medical editor for ABC News.

Dr. Besser wore a sharp suit and tie, Dr. Mukherjee had artfully...