In Tanzania, several senior officials of the main opposition Chadema party were in jail as of late Monday night. They include national chairman Freeman Mbowe and deputy chairman Tundu Lissu. They were detained on their way to World Youth Day celebrations organized by the party’s Youth Council. A Tanzanian government spokesperson did not respond to our request for an interview. But the police said they banned the event because it posed a threat to peace and could lead to unrest. Amnesty International and several other rights groups have called for the immediate release of the Chadema leaders. John Mrema, Chadema’s director of protocol, communications, and foreign affairs., tells VOA’s James Butty, Tanzanians do not want to return to what human rights groups call the dark days under late Tanzanian leader John Magufuli..