2010 CN Canadian Women’s Open: Round 2

1 of 5 Darren Carroll/Getty Images
made four birdies and a bogey to build a three-shot lead.
2 of 5 Darren Carroll/Getty Images
is four shots back after a 3-under 69.
3 of 5 Darren Carroll/Getty Images
moved into contention with a 6-under 66.
4 of 5 Darren Carroll/Getty Images
made seven birdies and two bogeys to move into second place.
5 of 5 Darren Carroll/Getty Images
fired a 5-under 67. Choi has finished in the top 3 in her last five events.