Dustin Johnson fired a second round of 69 to tie the lead at the weather-delayed US Open at Oakmont. The American was one back off surprise first round leader Andrew Landry at the start of his round, but two birdies against a single bogey drew him level at four-under par. World number 624 Landry is scheduled to play his second round on Saturday morning with the entire field playing the third round in the afternoon.
