PORT-AU-PRINCE, Haiti (AP) \u2014 While they await a new leader, Haitians are beginning a series of official ceremonies Tuesday to honor President Jovenel Mo\u00efse nearly two weeks after he was assassinated at home.\r\n\r\nThe ceremonies come as designated Prime Minister Ariel Henry prepared to replace interim Prime Minister Claude Joseph, who assumed leadership of Haiti with the backing of police and the military after the July 7 attack at Mo\u00efse's private home. Mo\u00efse was shot multiple times and his wife was seriously wounded.\r\n\r\nHenry is scheduled to be sworn in on Tuesday afternoon after promising to form a provisional consensus government to lead Haiti until elections are held.\r\n\r\n\u201cWe will need this unity to overcome the many challenges that beset us,\u201d Henry said. \u201cSome have observed the latest events with amazement, others wonder with reason about the management of the country.\u201d\r\n\r\nHenry said he has met with various unidentified actors as well as civil society and the private sector. \u201cI intend to continue and deepen these discussions, because it is the only way to bring the Haitian family together,\u201d he said.\r\n\r\nThe government released the names of Henry's cabinet, with the ministers of justice, economy, finance, agriculture and others keeping their positions.\r\n\r\nHaiti elections minister Mathias Pierre told The Associated Press on Monday that Joseph would step down and cede the position to Henry, who was chosen for the post by Mo\u00efse shortly before he was killed but had not been sworn in.\r\n\r\nThe change in leadership comes after a group of key international diplomats called on Henry to create a \u201cconsensual and inclusive government" in a statement issued Saturday that made no reference to Joseph. The Core Group is composed of ambassadors from Germany, Brazil, Canada, Spain, the U.S., France and the European Union as well as representatives from the United Nations and the Organization of American States.\r\n\r\nRobert Fatton, a Haitian politics expert at the University of Virginia, said Joseph's departure was to be expected.\r\n\r\n\u201cJoseph's fate was sealed over the weekend,\u201d he said. \u201cEverything that happens in Haiti has a powerful foreign component.\u201d\r\n\r\nOn the same day the Core Group issued its statement, first lady Martine Mo\u00efse arrived back unannounced in Haiti to the surprise of many. She had been recovering at a hospital in Miami after being seriously injured in the attack. On Monday, her office issued the first public statement since the killing, thanking Haitians for their support.\r\n\r\n\u201cYour moral support gives the presidential family the courage to go through this great ordeal and helps it transcend these moments of indescribable pain,\u201d it said.\r\n\r\nOn Monday, the U.N. said that Joseph and Henry had made significant progress in the past week to end the impasse and that it supports dialogue to find \u201cminimal consensus\u201d for holding fair legislative and presidential elections.\r\n\r\nAuthorities have arrested more than 20 suspects for alleged direct links to the killing. The majority of them were former Colombian soldiers, many of whom officials say were duped.