People run away as a building is toppled during a controlled demolition as part of an urban transformation in Ankara, Turkey, February 3, 2014. (Photo by Serap Doganyigit/Reuters)
A street vendor warms his foot around a fire during cold weather in the rebel-controlled area of Maaret al-Numan town in Idlib province, Syria, January 4, 2016. (Photo by Khalil Ashawi/Reuters)
Saeva dupka (Bulgarian: Съева дупка) is a cave in Northern Bulgaria near the village of Brestnitsa, Lovech Province (43°2′N 24°11′E). Its five halls and 400 metres of corridors offer some of the most beautiful cave formations in the country. Besides that the cave has hosted many Choral music performances, thanks to the excellent acoustic conditions. Saeva dupka was named after two brothers Seyu and Sae who used it as a hiding place during the Ottoman occupation of Bulgaria. Recent excavations have showed the cave was inhabited since Roman times. Currently Saeva dupka is one of the 100 Tourist Sites of Bulgaria.
China has recently relaxed its one child policy that was used to control a burgeoning population. A couple has their wedding photo taken in an old quarter of Beijing on May 24, 2016. (Photo by Michael Robinson Chavez/The Washington Post)
Revellers celebrate the start of the carnival season, a season of controlled raucous fun that reaches a climax during the days before Ash Wednesday and the start of Lent, at 11.11 am in Cologne, Germany, November 11, 2016. (Photo by Wolfgang Rattay/Reuters)
An employee controls the arms of a manned biped walking robot “METHOD-2” during a demonstration in Gunpo, South Korea, December 27, 2016. It stands 13-feet (3,96 m) tall, weighs 1.3 tons and wields a pair of 286-pound (129,73 kg), motion-tracking metal arms. (Photo by Kim Hong-Ji/Reuters)
An East German civilian (L) shows an East German customs officer the contents of his Trabant (auto) at checkpoint Potsdamer Platz in East Berlin in this November 24, 1989 file picture, as East Germany enforcing stringent customs controls to avoid smuggling. (Photo by Reuters)