NBC Nightly News Features Stars Who Make A Difference

Every night this week, NBC Nightly News is featuring a celebrity who is making the world a better place.

The lineup for the week is as follows:

• Sally Field, Vital Voices.
• Ben Affleck, Eastern Congo Initiative.
• Eva Longoria, Eva's Heroes.
• Usher, New Look Foundation.
• Will Ferrell, Cancer For College.
• Mariska Hargitay, Joyful Heart Foundation.

To find out more, including broadcast times, click here.