Europe, China, the USD and the Euro.

There is a lot afoot over these issues right now. In particular, Zerohedge has revealed a lot of very interesting news about both the European Debt Crisis and now China's threats to starting dumping our debt. It seems as though there may be an economic war going on underneath the headlines.

Several worthwhile Zerohedge and Market Ticker posts:

http://www.zerohedge.com/article/china-dumping-begins-reserve-managers-notified-any-non-usg-guaranteed-securities-must-be-div

http://www.zerohedge.com/article/what-country-next-coming-pan-european-sovereign-debt-crisis

http://www.zerohedge.com/article/ever-increasing-parallels-between-aig-and-greece-and-cds-puppetmaster-behind-it-all

http://market-ticker.org/archives/1950-Is-That-A-Bailout-Or-A-Lit-Fuse.html