Former Dallas police officer Amber Guyger has been indicted on a murder charge in the killing of her black unarmed neighbor in his own apartment. AP hide caption

A street candy seller walks along the U.S.-Mexico border fence in Mexicali, Mexico, while U.S. Army soldiers fortify it with barbed wire. Defense Secretary Jim Mattis is likely to reduce the number of active-duty U.S. troops who are currently deployed at the Mexico border, from around 5,900 to around 4,000. Luis Boza/VIEW press/Corbis via Getty Images hide caption

Police respond on Sept. 17, 2017, in St. Louis to demonstrators protesting the acquittal of former St. Louis police officer Jason Stockley, who had been charged with first-degree murder in a 2011 on-duty shooting. A federal grand jury on Thursday indicted three officers who responded to the protests in the beating of a fourth officer, who was working undercover that night. Scott Olson/Getty Images hide caption

Military personnel and Customs and Border Protection officers gather at the San Ysidro Port of Entry in San Diego. The number of immigrants in the U.S. without legal status has declined to its lowest level in more than a decade, according to a new report released Tuesday. Gregory Bull/AP hide caption

Laura Martin mourns her father, TK Huff, who died during the Camp Fire, during a vigil on Sunday in Chico, Calif. Noah Berger/AP hide caption

Secretary of Homeland Security Kirstjen Nielsen speaks in front of the border wall separating Tijuana, Mexico, and San Diego. Gregory Bull/AP hide caption

An aerial view of a neighborhood destroyed by the Camp Fire in Paradise, Calif. Fueled by high winds and low humidity, the wildfire ripped through the town, charring more than 140,000 acres and killing more than 70 people. Justin Sullivan/Getty Images hide caption

Cal Fire firefighters comb through a house destroyed by the Camp Fire in Paradise, Calif., on Tuesday. Terray Sylvester/Reuters hide caption

A Marine uses concertina wire to fortify the border separating Tijuana, Mexico, and San Diego, near the San Ysidro Port of Entry. Gregory Bull/AP hide caption

Alexander Hamilton's Society of the Cincinnati Eagle insignia at the Museum of the American Revolution in Philadelphia. Matt Rourke/AP hide caption

Firefighters try to beat back the Woolsey Fire in the early hours of Friday. One day earlier, the blaze ignited as mourning residents tried to cope with quite another kind of terror in Thousand Oaks, Calif. Eric Thayer/Reuters hide caption

Deferred Action for Childhood Arrival recipients and other young immigrants rally at the U.S. Capitol in Washington in March. A federal appeals court has blocked the Trump administration's effort to end the program. J. Scott Applewhite/AP hide caption