Four days after the central African nation held disputed presidential elections that incumbent Ali Bongo was reported to have won, army officers appeared on state television to announce they’d canceled the Aug. 26 vote and dissolved the country’s institutions. Bongo first took office in 2009, succeeding his late father, who had held power since 1967. While the oil producer hasn’t had to deal with the jihadist attacks or spreading insecurity that’s dogged much of West Africa, the ruling family’s grip on power has come under pressure in recent years.