My Uncle, Ron Rice, has been involved in ministry in Nigeria for the last number of years. A very succesful program that he has started provides wheelchairs for disabled children and adults that have Polio. He has produced a video about this ministry and his partner Ayuba Fufwan. You can watch a 2005 'web' copy below. (11 minutes long)

Depending on your connection speed, you will need to wait a minute or two for the video stream buffer to fill - then hit play. Not everyone has a copy of the QuickTime plugin - if you want, you can get a free Window's copy here.