Where to watch the marathon
Oklahoma native Emily LeVan has been preparing for the U.S. Olympic marathon trials while her young daughter, Emily, battles leukemia. LeVan is chronicling both trials as well as the family's fund-raising efforts for the Maine Children's Cancer Project at www.twotrials.com
Want to watch LeVan at today's Olympic trials? Go to www.nbcolympics.com/marathon
. The race starts at 7 a.m.