Republican presidential candidate Donald Trump poses for a picture with a woman and child at the Iowa State Fair in Des Moines.
Fairgoers watch Trump's helicopter take off.
A woman waves from a chairlift.
Sen. Bernie Sanders, a Democratic presidential candidate, speaks to the press.
Republican presidential candidate and former Florida Gov. Jeb Bush, center, and Iowa Gov. Terry Branstad, left, eat pork chops.
Big Mac is a 1,166-pound big boar champion.
A rolled-up American flag.
People attend a media event for Democratic presidential candidate Hillary Clinton.
Brian Bolton, a Republican from Creston, Iowa, participates in a mounted shooting competition.
Caroline Kramer, 18, of Stanwood, Iowa, had yet to decide whom she would support in her first presidential election.
A sheep from Wisconsin.
There were 19 rides at the fair, according to the event's website.
Shelby Heston, a 16-year-old from Fairfield, Iowa, gets prepped for the Cowgirl Queen competition. At right is her mother, Krista Heston, who said she would vote Republican no matter who won the nomination.
A man in a cowboy hat stands inside the office of the Horse Barn.
A dairy cow named Ginger.
Ron Carnegie attends the state fair as George Washington before heading to a minor-league baseball game. Photographing him was Landon Nordeman's favorite moment: "I mean, really, how American can you get?" As for his second favorite moment, Nordeman said: "I got to milk a cow."