Forty years. That’s how long Ugandan President Yoweri Museveni has been in power. The 81-year-old was sworn in Tuesday for a seventh consecutive term to extend his presidency over a further five years that may well be his last — although not necessarily for the Museveni family. Army chief Gen. Muhoozi Kainerugaba, the president's son and presumptive heir, oversaw dayslong rehearsals of the military parade that animated the inauguration of Museveni, with Russian-made Sukhoi fighter jets flying noisily over official ceremonial grounds in Kampala, the Ugandan capital. Museveni took the oath of office and received the ceremonial instruments of power while being cheered by thousands attending the event in the Kampala suburb of Kololo. The president urged Ugandans to work hard and build wealth for their families, citing the stories of individuals whose entrepreneurial spirit had paid off. “No more excuses,” he said.…