Trevor Noah will appear in Santa Monica on Tuesday, then head to the U.K. for the Edinburgh Festival Fringe in late August. Don't worry, he'll be back in time for his debut as the Daily Show host. Michael O'Brian/Flickr hide caption

itoggle caption Michael O'Brian/Flickr

President Obama and his delegation stand Monday during a welcome ceremony with Ethiopia's Prime Minister Hailemariam Desalegn at the National Palace in Addis Ababa, Ethiopia. Tiksa Negeri /Reuters /Landov hide caption

itoggle caption Tiksa Negeri /Reuters /Landov

An elephant in South African offers an up-close glimpse of its prodigious instrument. According to Sean Hensman of Adventures with Elephants, trunks like this one could help the U.S. Army develop a better landmine sensor. Greatstock/Barcroft Media/Barcroft Media/Landov hide caption

itoggle caption Greatstock/Barcroft Media/Barcroft Media/Landov

Workers finish installing a billboard showing Kenya's President Uhuru Kenyatta and President Barack Obama in downtown Nairobi a day before Obama's visit. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

The hand-colored photo, titled "Reclining young lady," is of Stella Osarhiere Gbinigie when she was 16. Solomon Osagie Alonge/Franko Khoury/National Museum of African Art hide caption

itoggle caption Solomon Osagie Alonge/Franko Khoury/National Museum of African Art

Kenyan graffiti artist Bankslave created a mural of Barack Obama. The president himself will visit Kenya on Friday. One of the president's agenda items is to promote solar power. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP