Today in Pictures: Sept. 8

Mountaineer Audhild Hogasen, left, of Norway, and Yuri Rhodenborgh of the Netherlands walk on parallel lines during the Highline Extreme event on the Moleson peak, 6,500 feet above sea level, in the Swiss Alps. Twenty-five of Europe's best slackliners compete until Sept. 11 on eight different lines, ranging from 150 feet to more than 1600. Balancing on the slackline is a training method for climbers to improve their balance. The athletes are secured with a rope.

Firefightes prepare to battle a forest fire in Monchique, Portugal. The Monchique fire flared up again during the night, forcing the evacuation of several settlements.

Democratic presidential nominee Hillary Clinton poses for a photo with supporters after a voter registration rally at Johnson C. Smith University in Charlotte, North Carolina.

Russian President Vladimir Putin signs a visitors' book at the Leo Tolstoy museum and estate in Yasnaya Polyana, Russia. Tolstoy lived and wrote at the estate and is buried nearby.

A goat tries to escape from the trunk of a taxi after being purchased at a livestock market ahead of the Eid al-Adha festival in Kolkata, India. Eid al-Adha marks the willingness of Abraham to sacrifice his son for God. Muslims today are expected to sacrifice an animal if they can afford it, sharing the meat with those who are less fortunate as a commemorative act of charity.

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen. Yemen is embroiled in a civil war pitting the internationally recognized government and a Saudi-led coalition against the Shiite Houthi rebels, who are allied with army units loyal to a former president.

Amputee Amy Purdy dances with a robotic arm during the opening ceremony of the Rio 2016 Paralympic Games at Maracana Stadium on Wednesday evening.

PHOTOS: Wheelchair Jumps and Dancing With Robots at Paralympics Opening

A mounted berkutchi (an eagle hunter) holds his bird, a golden eagle, during the World Nomad Games in Kyrgyzstan's Kyrchin gorge. Athletes at the games compete in 23 events with the aim of preserving the  cultural heritage of nomadic peoples. 

Workers of the Ministry of Public Health and Population fumigate in the street against mosquito breeding to prevent diseases such as malaria, dengue and Zika, in Port-au-Prince, Haiti, on Wednesday evening.

The "Tribute in Light" rises from the lower Manhattan skyline Wednesday evening. The lights were being tested in advance of the 15th anniversary of the Sept. 11 terrorist attacks.

Wednesday in Pictures: Preparing for the Hajj and More