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Members of a group cross-country skiing warming-up under the insctuction of Bruno Haeberli, center, during a cross-country day trip organised by charitable foundation Pro Senectute's regional office of the Canton of Bern, in Kandersteg, in the Bernese Oberland, Switzerland, on February 13, 2018. Pro Senectute was founded in 1917, the foundation works for the well-being, dignity and rights of older people and offers a variety of services. (KEYSTONE/Gaetan Bally)