Ibrahima Diallo moved from Senegal to New York in 2003. Since then he's made a career as New York City tour guide. But, like everyone, Diallo has a personal map of the city too, and he gave The World's Alex Gallafent a tour.
In the West African nation of Senegal, an informal recycling industry has poisoned children and left a neighborhood severely polluted. Residents caused the contamination by pulling apart car batteries to extract the lead. Jori Lewis reports.
Hundreds of South Africans protested President Barack Obama's visit for what they called a failure to meet expectations and promises. The second stop of President Obama's tour, the visit has become increasingly complicated with the deteriorating health of former South African President Nelson Mandela.