An actor plays an injured passer-by during Exercise Strong Tower, the scene of a mock terror attack at a disused underground station in central London, Britain June 30, 2015. London police held their biggest-ever terrorism drill on Tuesday, pitting the emergency services against a group of marauding attackers, nearly 10 years since four young British Islamists killed 52 people in suicide bombings on London's transport network in July 2005. (Photo by Peter Nicholls/Reuters)

This thing has 24 cylinders, 1,704 cubic inches, 12 GMC superchargers (blowers), 8 nitrous bottles and it runs! Why build such a beast? “Because I can,” Harrah says. There’s no other reason to take a 24V71 and build an intake manifold that weighs 1,000 pounds and mount eight 6-71 superchargers on top of four others. This is a V24 Detroit Diesel (normally used to power ships) which is two V12 Detroits joined together nose to nose with splined cranks.

This photo was caught on camera by amateur photographer Kutub Uddin, 27, and was taken in his back garden in Bognor Regis, West Sussex. The red-eyed tree frogs have been Mr Uddin's pets for four months and he often lets them out to roam around his garden. Photo: “Ohh no :( Raining”. (Photo by Kutub Uddin)

This beautiful set of images capture the moment a young ballet dancer interacts with her four-legged friends against some iconic backdrops including the Church of the Savior on Blood and the Admiralty building in Saint Petersburg. The enchanted photos were taken by Andrey Seliverstov, 59 from Saint Petersburg, Russia. Here: Nine year old Maria Palkina dancing with dogs. (Photo by Andrey Seliverstov/Caters News Agency)

“BASE jumping, also sometimes written as B.A.S.E jumping, is an activity that employs an initially packed parachute to jump from fixed objects. “B.A.S.E.” is an acronym that stands for four categories of fixed objects from which one can jump: buildings, antennas, spans (bridges), and earth (cliffs)”. – Wikipedia

Photo: Felix Baumgartner, world-renowned B.A.S.E jumper, is pictured in this undated handout photo. Baumgartner will attempt the first unpowered crossing of the strait between England and France. (Photo by Red Bull via Getty Images)

In this picture taken on January 11, 2021, young gymnasts train at the Li Xiaoshuang Gymnastics School in Xiantao, Hubei province. This summer's delayed Tokyo Olympics, which are now due to start on July 23, 2021, will be the defining moment for Chinese gymnasts who have trained relentlessly since as young as age four in the pursuit of gold. (Photo by Nicolas Asfouri/AFP Photo)

“San Diego Comic-Con International, also known as Comic-Con International: San Diego (as given on its website), and commonly known as Comic-Con or the San Diego Comic-Con, was founded as the Golden State Comic Book Convention and later the San Diego Comic Book Convention in 1970 by Shel Dorf and a group of San Diegans. It is traditionally a four-day event (Thursday through Sunday — though a three-hour preview night on Wednesday is open to professionals, exhibitors, and some guests pre-registered for all four days) held during the summer in San Diego, California, United States, at the San Diego Convention Center. Comic-Con is both the name of the annual event and the common name of the organization”. – Wikipedia

Photo: Rannie Rodil and Laya Bella attend Day 1 at Comic-Con 2011 on July 21, 2011 in San Diego, California. (Photo by John Shearer/Getty Images)