Central American migrants walking to the U.S. start their day departing Ciudad Hidalgo, Mexico, on Sunday. Despite Mexican efforts to stop them at the border, thousands of Central American migrants resumed their advance toward the U.S. border early Sunday in southern Mexico. Moises Castillo/AP hide caption

In this photo taken Friday, Oct 5, Congolese Soldiers patrol in an area civilians were killed by The Allied Democratic Forces rebels in Eastern Congo. Congo' military said Sunday, Oct. 21, that rebels attacked an Ebola treatment centre in Beni, leaving over a dozen civilians dead and abducted about a dozen children, which could force crucial virus containment efforts to be suspended in the area. Al-hadji Kudra Maliro/AP hide caption

Jamal Khashoggi poses at an event in Istanbul in May. Saudi state media confirmed the journalist's death, but details remain fuzzy. Omar Shagaleh/Anadolu Agency via Getty Images hide caption

An Iraqi protester stands flashing the victory gesture outside the burning headquarters of the Iranian Consulate in Basra on Sept. 7. Haidar Mohammed Ali/AFP/Getty Images hide caption

This aerial picture shows the remains of a 10-story hotel in Palu in Indonesia's Central Sulawesi on Sunday. Azwar/AFP/Getty Images hide caption

Sen. Jeff Flake, R-Ariz., listens as Christine Blasey Ford testifies before the Senate Judiciary Committee on Thursday. Michael Reynolds/AP hide caption

NPR's Wei Quan holds a sign prompting people to respond to the #DearWashington social media conversation about what issues the next president should know about this election season. Raquel Zaldivar/NPR hide caption