Free dental clinic changes lives in Oklahoma

Over ten years, the non-profit Mission of Mercy has treated more than 16,000 patients and donated more than $12 million in free dental care. The organization changes lives for those in need, especially for young kids.

Watch TV shows, movies and more on Yahoo View.

About NBC Nightly News with Lester Holt

Watch "NBC Nightly News with Lester Holt," providing reports and analysis of the day's most newsworthy national and international events. See More

Check out more stuff on Yahoo View