This Week in Photos, Week of May 4-10, 2012

Horses race in the 138th Kentucky Derby, Cinco de Mayo is celebrated around the world, and chihuahuas parade around Kansas City, MO.

Men on stilts dressed as chimney sweeps take part in the Sweeps Festival in Rochester, England. The annual festival dates back 400 years and was originally the one day of the year that the chimney sweeps could afford time off to celebrate the coming of spring