Aetna is the latest big health insurer to retreat from the exchanges established under the Affordable Care Act. Jessica Hill/AP hide caption

Kristin Armstrong won Olympic gold in the cycling time trial the day before she turned 43. Tim de Waele/Corbis via Getty Images hide caption

Bobby Hutcherson performs at the Monterey Jazz Festival, in Monterey, Calif. in 2013. Craig Lovell/Corbis via Getty Images hide caption

FBI Director James Comey testified before the House Oversight panel July 7, telling lawmakers that Hillary Clinton had been truthful with the bureau during a 3 1/2 hour interrogation at FBI headquarters. Alex Wong/Getty Images hide caption

South Africa's Caster Semenya competes in the women's 800 meters in Rome on June 2. Tiziana Fabi/AFP/Getty Images hide caption

Michigan Wolverines fans do the wave in support of their team as it faces the Brigham Young Cougars at Michigan Stadium on Sept. 26, 2015, in Ann Arbor, Mich. Doug Pensinger/Getty Images hide caption

Hearing Officer Jim Teal presides over a session of Early Intervention Family Drug Court in Sacramento, Calif., in March. The county program helps keep families together — and saves taxpayers $7 million annually, Sacramento County officials say. Robert Durell for Kaiser Health News hide caption

Russian President Vladimir Putin (center) joins Russia's federal highway agency head Roman Starovoit (left) and Crimean leader Sergei Aksyonov (second from left) on a visit to the Kerch Strait bridge construction site on Tuzla Island on March 18. The bridge will link Crimea to mainland Russia. Mikhail Klimentyev/AP hide caption

Jace Clayton, a.k.a. DJ /rupture. Erez Avissar/Courtesy of the artist hide caption