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Soldiers use electronic sensors to search for missing firefighters under a line of fire trucks caught in massive gas explosions in Kaohsiung, Taiwan, Friday, August 1, 2014. A series of underground explosions about midnight Thursday and early Friday ripped through Taiwan's second-largest city, killing scores of people, Taiwan's National Fire Agency said Friday. (Photo by Wally Santana/AP Photo)

Soldiers use electronic sensors to search for missing firefighters under a line of fire trucks caught in massive gas explosions in Kaohsiung, Taiwan, Friday, August 1, 2014. A series of underground explosions about midnight Thursday and early Friday ripped through Taiwan's second-largest city, killing scores of people, Taiwan's National Fire Agency said Friday. (Photo by Wally Santana/AP Photo)
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01 Aug 2014 12:16:00


Some of London's telephone operators and engineers, trying out their gas masks at the anti-gas civilian training centre in Gloucester, where they were taught how to deal with gas attacks. (Photo by Harry Todd/Fox Photos/Getty Images). 13th February 1937
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24 Apr 2011 12:20:00
Women carry gas cylinders to fill them at a distribution point in Cairo January 19, 2015. Egypt is going through its worst energy crisis in decades and is seeking fresh sources of natural gas, which powers most of its homes and factories. (Photo by Mohamed Abd El Ghany/Reuters)

Women carry gas cylinders to fill them at a distribution point in Cairo January 19, 2015. Egypt is going through its worst energy crisis in decades and is seeking fresh sources of natural gas, which powers most of its homes and factories. (Photo by Mohamed Abd El Ghany/Reuters)
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20 Jan 2015 13:21:00
“É proibido proibir”. (Photo by Thais Nuzzi)

“É proibido proibir”. (Photo by Thais Nuzzi)
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07 Jun 2015 11:50:00


Three workers demonstrating the different types of gas masks used in mine rescue work. (Photo by Fox Photos/Getty Images). December 1925
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20 Apr 2011 09:17:00


A fireman from the London Fire Brigade, wearing a smoke helmet. (Photo by Topical Press Agency/Getty Images). Circa 1908
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22 Jul 2013 20:25:00
A woman wearing a bikini stands next to fuel pumps as she waits to top up fuel at a petrol station in Kiev, Ukraine, September 26, 2015. (Photo by Valentyn Ogirenko/Reuters)

A woman wearing a bikini stands next to fuel pumps as she waits to top up fuel at a petrol station in Kiev, Ukraine, September 26, 2015. One of the largest networks of petrol stations in Ukraine organized a campaign in which anyone who showed up in swimwear at a particular gas station during specified hours would receive free gasoline, according to representatives of the company. (Photo by Valentyn Ogirenko/Reuters)
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29 Sep 2015 08:06:00
David LaChapelle, Land Scape Anaheim, 2013, chromogenic print, 70 3/4 x 95 inches, 179.7 x 241.3 cm, edition of 3. Image courtesy of the artist and Paul Kasmin Gallery. (Photo by David LaChapelle Studio)

David LaChapelle, Land Scape Anaheim, 2013, chromogenic print, 70 3/4 x 95 inches, 179.7 x 241.3 cm, edition of 3. Image courtesy of the artist and Paul Kasmin Gallery. (Photo by David LaChapelle Studio)
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03 Mar 2014 10:14:00