President Barack Obama speaks during a campaign rally for Democratic presidential nominee Hillary Clinton at Cheyenne High School on Oct. 23 in North Las Vegas, Nev.
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Crews work to stop a gas leak at a relief well at the Aliso Canyon facility in Los Angeles in December 2015. A federal interagency task force has released dozens of pipeline safety recommendations to prevent another leak.
U.S. Army Capt. Gerrard Spinney (right) speaks to his Iraqi army counterpart from the Ninawa Operations Command prior to a security meeting at Camp Swift, Iraq, earlier this month.
1st Lt. Daniel Johnson/AP
Donald Trump and his running mate, Indiana Gov. Mike Pence, right, help to unload supplies for flood victims during a tour of the flood damaged area in Gonzales, La., Friday.
Texas Tech freshman Regan Elder helps drape a bed sheet with the message "No Means No" over the university's seal at the Lubbock, Texas campus in 2014 to protest what students say is a "rape culture" on campus.
President Obama speaks to the media after a meeting with Secretary of Defense Ashton Carter and members of the Joint Chiefs of Staff at the Pentagon on Thursday in Arlington, Va.
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President Obama slammed Republican nominee Donald Trump as "unfit" and "woefully unprepared" to be president during a news conference with Singapore's prime minister at the White House on Tuesday.
Pablo Martinez Monsivais/AP