Jolie tells People magazine, "I chose to take out this ad because when Congress returns from recess, they have the chance to fully fund peacekeepers in Darfur.
"The situation in Darfur has been going on far too long. It's only getting worse.
"Reports are pouring in about mass atrocities including children getting raped and killed.
"If people are aware of the facts, I believe many will be driven to action."
The Mr. and Mrs. Smith star, who noted in the ad, "I'm an actress, and certainly no foreign policy expert," has visited the region twice--once in October 2004 and again in June 2005.