Behind the scenes at the 2017 U.S. Open at Erin Hills

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The beer has been flowing for spectators at Erin Hills
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Kevin Chappell seen from beneath the grandstands.
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One of the concession stands that dot the property this week.
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Tees with the U.S. Open logo stamped on them.
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Brooks Koepka walks between holes during the second round.
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Brooks Koepka and Thomas Pieters on the course.
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Amateur Cameron Champ tees off during the second round.
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The clubhouse at Erin Hills.
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Fans lounge on the grass while watching the tournament on screens.
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A fan watches the day's action.
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A look at the grandstands on Friday.
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A spectator uses a U.S. Open umbrella at Erin Hills.
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Jon Rahm during the second round.
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U.S. Open marshalls working the tournament.
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Paul Casey searches for his golf ball.
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Rickie Fowler.
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An infrared photograph of Rickie Fowler and Hideki Matsuyama on the green.