DAKAR, Senegal (AP) — Niger’s military leader has accused the presidents of France, Benin and Ivory Coast of supporting armed groups that attacked an air force base in the capital, wounding four soldiers and damaging an aircraft. Niger’s forces responded quickly to the assault early Thursday, killing 20 of the attackers and arresting 11 others, state television reported. “We remind the sponsors of those mercenaries, who are Emmanuel Macron (president of France), Patrice Talon (president of