Joseph Kabila took the oath Tuesday for a second term as president of the Democratic Republic of Congo, following a chaotic election his main rival also claims to have won. The 40-year-old, who has been in power since 2001, vowed to “safeguard national unity” during a ceremony largely snubbed by the international community. Kabila was last week confirmed the winner by a Supreme Court the opposition says he packed with loyalists just before the Democratic Republic of Congo’s November 28 polls.