The 37th International Hot Air Balloon Week in Switzerland

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A pilot inflates his balloon before the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. According to the organizers, over 80 balloons from 20 countries are participating in the ballooning event in the Swiss mountain resort. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons fly during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A pilot checks his balloon before the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons fly during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons fly during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A pilot inflates his balloon before the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A pilot inflates his balloon before the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A balloon flies during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A balloon flies during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons fly during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A balloon flies during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons fly during the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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A pilot inflates his balloon before the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)

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Balloons of all shapes and sizes get ready for take off at the 37th International Hot Air Balloon Week in Chateau-d’Oex, January 24, 2015. (Photo by Pierre Albouy/Reuters)