“The Boeing X-45 unmanned combat air vehicle is a concept demonstrator for a next generation of completely autonomous military aircraft, developed by Boeing's Phantom Works. Manufactured by Boeing Integrated Defense Systems, the X-45 was a part of DARPA's J-UCAS project”. – Wikipedia

Photo: Two X-45A Unmanned Combat Air Vehicles (UCAV) are shown to members of the news media July 11, 2002 at Edwards Air Force Base, California. The X-45A, developed by The Defense Advanced Research Projects Agency and the Boeing Company, is the first unmanned system designed from inception for combat missions. (Photo by David McNew/Getty Images)

Revellers pose during the 24th Street Parade dance music event in Zurich, August 29, 2015. (Photo by Arnd Wiegmann/Reuters)

“The Glastonbury Festival of Contemporary Performing Arts, commonly abbreviated to Glastonbury is a British performing arts festival, best known for its contemporary music, but also for dance, comedy, theatre, circus, cabaret and many other arts. For 2005, the enclosed area of the festival was over 900 acres (3.6 km²), had over 385 live performances and was attended by around 150,000 people. In 2007, over 700 acts played on over 80 stages and the capacity expanded by 20,000 to 177,000. In 2011 UK Music published a report stating that Glastonbury Festival contributes over £100 million annually to the UK economy” – Wikipedia

Photo: Festival goers dance in the mud in front of the Pyramid stage at Worthy Farm, Pilton, Somerset, at the 2004 Glastonbury Festival, 26 June 2004. (Photo by Matt Cardy/Getty Images)

Željava Air Base, situated on the border between Croatia and Bosnia and Herzegovina under Plješevica Mountain, near the city of Bihać, Bosnia, was the largest underground airport and military air base in the former Yugoslavia, and one of the largest in Europe. (Photo by Thomas Windisch/Exclusivepix Media)

A soldier helps another with her ear protection at the Terningmoen Camp in Elverum, Norway on March 23, 2017. Soldiers demonstrate their skills and tactics during a contract drill as they train to become part of the world's first all-female special forces unit, the Jegertroppen or “hunter troops”. (Photo by Carolina Reid/NBC News)

An Israeli soldier from the Nahal Infantry Brigade runs through smoke released from a smoke grenade during an urban warfare drill near an abandoned hotel in Arad, southern Israel February 8, 2017. (Photo by Amir Cohen/Reuters)

Dhruva Aliman does a back somersault as he dismounts from a slackline on the beach at Santa Monica, California on October 19, 2014. Slackline is a balance sport where a line of webbing is adjusted at different levels of tension between two anchor points and participants (called slackers) perform tricks and stunts including somersaults. (Photo by Mark Ralston/AFP Photo)

A hot air balloon in the likeness of Yoda from Star Wars prepares for liftoff at the 21st Philippine International Hot Air Balloon Festival at the former Clark US Air Force base in Pampanga Province, Philippines on February 9, 2017. (Photo by Xinhua News Agency/Rex Features/Shutterstock)