WASHINGTON (AP) — President Barack Obama and dozens of African leaders are holding talks today on regional security issues and business investments on the continent.

The meetings will close out Obama's unprecedented three-day U.S.-Africa summit in Washington. He hosted the leaders for a dinner at the White House Tuesday night.

Much of the summit has focused on Africa's economic potential and new financial commitments from U.S. businesses. But Wednesday's talks will delve into some of the problems still plaguing the continent, including terrorism and extremism.

Obama will close the summit with a late-afternoon news conference. First lady Michelle Obama is also hosting a spouses' event with former first lady Laura Bush.