Protesters face off with police and the National Guard on February 1 2017, near Cannon Ball, North Dakota.
Photograph: Ryan Vizzions

Trees in snow, St Moritz, 1947.
Photograph: Alfred Eisenstaedt

Jackie Kennedy, Laurentian mountains, Canada, 1968.
Photograph: Harry Benson

Christmas tree picking, Germany, 1947.
Photograph: Tony Vaccaro

Southern Pacific engine, Donner Pass, California, 1949.
Photograph: John Dominis

Reindeer being herded, Finland, 1940.
Photograph: Carl Mydans

Christmas Day in Rome, Italy, 1965.
Photograph: Tony Vaccaro