American snowboarder Chloe Kim has continued her winning streak to secure back-to-back Olympic golds. Kim, 21, dominated the women’s halfpipe at the Beijing Winter Games, finishing almost four points ahead of Queralt Castellet of Spain. The American scored 94 on her first run, blurting out “oh my God” as she came into the finish. “I was so proud of myself. I had the worst practice, ever. I probably landed my run twice when I’m used to landing it eight times, normally, and so that puts you in a weird headspace.” While her score of 94 stood throughout, she said the win was not comfortable. “The …