Activists worldwide put the spotlight on Ugandan warlord Joseph Kony, Friday.
Invisible Children, the group behind the "Kony 2012" effort, is urging people nationwide to participate in its "Cover the Night" campaign.
Friday's all-day event is to make Kony's crimes as public as possible -- by covering every block of every major city with stickers, signs and posters about Kony.
Joseph Kony is accused of killing thousands in Uganda and building his army by kidnapping and mutilating children.
The U.S. Senate is also taking action against Kony by introducing legislation expanding a program offering rewards for information about his whereabouts.
Kony is a shadowy figure, but freelance journalist Sam Farmar interviewed the warlord in 2006 at a camp in the Ugandan bush.
Farmar recently spoke with CBN News Reporter Efrem Graham via Skype from London. Watch the interview here.