The United States and China have been vying at the top of the standings in terms of overall medal count and even for the amount of gold medals apiece at the 2012 Summer Olympics in London, and the U.S. has finally matched China near the end of the first week with an impressive day today at the games.

The U.S. and China now both have 18 gold medals apiece, but the United States is now up by three medals with 37 overall. China has 34 and sits in second place, far above the next several countries. Japan is next with 19 medals and Germany and Russia are tied with 17 apiece. It's a major change from just a day ago when North Korea, South Korea and France were all near the top of the leaderboard.

Day by day things change so rapidly, so it's likely to be another flip-flop at the top of the standings by tomorrow at this time.