First lady Michelle Obama stands for an official photo with China's President Hu Jintao at the Grand Staircase in the White House in Washington, Wednesday, Jan. 19, 2011. (AP Photo) Former dictator Jean-Claude "Baby Doc" Duvalier waves from a residential balcony in Port-au-Prince, Haiti, Thursday Jan. 20, 2011. Duvalier returned Sunday to Haiti after nearly 25 years in exile, a surprising and perplexing move that comes as his country struggles with a political crisis and the stalled effort to recover from last year's devastating earthquake Youth gather at a portrait of Mohamed Bouazizi in Sidi Bouzid, central Tunisia, Wednesday Jan. 19 2011. The Tunisian unrest began after Mohamed Bouazizi, a 26-year-old with a university degree, set himself on fire when police in the central town of Sidi Bouzid confiscated the fruits and vegetables he was selling without a permit. He later died in a hospital near Tunis, and his desperate act touched a nerve with educated, unemployed youths nationwide. Protests against Tunisia's ruling party continued throughout the week. An aerial view of a mudslide in Teresopolis, Brazil. Torrential rain tore through Rio de Janeiro's mountains, killing at least 64 people in 24 hours, the state's emergency rescue office said Wednesday. The death toll is expected to rise as firefighters reach remote valleys and steep mountainsides where neighborhoods were destroyed by mudslides and flooding, said Jorge Mario Sedlacek, the mayor of Teresopolis, a mountain town just north of Rio where at least 54 people died. About 1,000 there were left homeless.