See the stunning images in the 4th annual International Drone Photography Contest
A look at some of our favorite images of the week.
Winter weather in the U.S.A person struggles to cross a street in blowing and falling snow Jan. 5 in St. Louis. Snow that began in parts of Missouri on Jan. 4 picked up intensity after dawn the next day; several inches of snow were on the ground by mid-morning. n addition to the snow in the Midwest and Northeast, a “polar vortex” — a winter blast of extreme Arctic air — brought bitter cold to much of the United States early this week. Read about the polar vortex.Jeff Roberson/AP