. >> we are really pleased to say ou very own news 4 mark seager is going to be emceeing the race. support out there to you in the efforts. years, you hing nin will have raised more than $600,000 to donateo children's national. dr. williams, talk to me about the impact those make for the kids who need the help, who need the research to be done, who need cured. >> thiis an extraordinary legacy that ben and his family have given us and children who are diagnosed with high risk ukemia. it's a very painful process. children have to go -- undergo stints that go into their bones. one of the tngs that we are actually using these resources for is to test a painless way to see whether or not a child's leukemia has come back. actually just take a ifpicture. we could use that picture to see that thes leukemia coming back, we could actually treat it when it was at very low level sps -- levels. >> something that makes it less scary for kids. so they don't have to be around machines and hooked up to things. about how many kids would you say are treated there every year at children's with cancer?