Hill Harper urges volunteerism

CSI:NY star Hill Harper is just one of many celebrities taking part in EIF's iParticipate program. He recently spent time with New York's Central Park Medical Unit- a volunteer ambulance service shooting scenes for this week's episode. Hill talks to CNN exclusively about his work with EIF/iParticipate and why it is important for everyone to volunteer.

When United Healthcare heard about the good work that CPMU was doing, they decided to donate $10,000 to the organization. For more on EIF/iParticipate, check out www.iparticipate.org.