William Land Park will come alive Saturday with over 3,000 community members walking together to fight against heart disease in the Sacramento Heart Walk.  Start! Heart Walk is locally sponsored by Sutter Heart & Vascular Institute, and aided nationally by the American Heart Association.  The event is scheduled to begin from 8 a.m. to noon. The Sacramento community is very much involved, said Kristine Mosqueda-Kelly with American Heart Association.  Families and individuals are participating in this event to share their stories and hopefully raise community awareness about the fight against heart disease and stroke.  The event is driven by volunteers and walkers to fund lifesaving researc