Rex Tillerson visits South America, Congress debates releasing the Nunes memo, and the surviving suspect in the 2015 Paris terror attacks goes on trial in Belgium.

Venezuela marks the first anniversary of Hugo Chavez's death; Israeli prime minister Benjamin Netanyahu visits the United States; and U.S. president Barack Obama releases the FY2015 budget proposal.

The IMF spring meeting takes place, the fallout continues over the release of the Panama papers, and marathons are held at the North Pole and in North Korea.

Frank M. Snowden, Andrew Downey Orrick professor emeritus of history and history of medicine at Yale University, sits down with James M. Lindsay to discuss how epidemics have shaped world history. Sn…

A report on Flight MH17 is released, South Korean President Park Geun-hye meets with President Obama, and a U.S. presidential debate is held.