Obama's $3 billion boost for Africa The private sector commitments Obama was announcing Friday build on that effort, administration officials said. The goal is to achieve sustained agriculture growth and raise 50 million people out of poverty over the next 10 years. "It's not about replacing aid," said Mike Froman, a top Obama adviser for international economics. It's about combining aid with private capital. Obama is also expected to call on countries to fulfill the financial food security pledges they made in 2009. The pledge period for L'Aquila Food Security Initiative ends later this year, and some humanitarian groups say much of the promised money has not been dispersed. The G-8 will release an accountability report this weekend detailing how much of the $22 billion is still on the sidelines. Administration officials say the U.S. is on track to fulfill its $3.5 billion pledge. On Saturday, Obama and the other G-8 leaders will be joined at Camp David by the heads of four African countries - Ghana, Ethiopia, Tanzania and Benin - for a session on food security. While administration officials say Obama will urge wealthy nations to maintain their commitment to alleviating hunger in Africa, the U.S. and other G-8 countries were not expected to announce any new financial pledges of their own.