Who really owns the U.S of A?

Even though most of our country's $14 trillion debt is held by private banks in the U.S., the Treasury Department and the Federal Reserve Board estimate that, as of December, about $4.4 trillion of it is held by foreign governments that have purchased our treasury securities. 
1. Mainland China
Amount of U.S. debt: $891.6 billion
Share of total foreign debt: 20.4%
2. Japan
Amount of U.S. debt: $883.6 billion
Share of total foreign debt: 20.2%
3. United Kingdom
Amount of U.S. debt: $541.3 billion
Share of total foreign debt: 12.4%
4. Oil Exporters
Amount of U.S. debt: $218 billion
Share of total foreign debt: 5%
5. Brazil
Amount of U.S. debt: $180.8 billion
Share of total foreign debt: 4.1%
6. Caribbean Banking Centers
Amount of U.S. debt: $155.6 billion
Share of total foreign debt: 3.6%
7. Hong Kong
Amount of U.S. debt: $138.2 billion
Share of total foreign debt: 3.2%
8. Canada
Amount of U.S. debt: $134.6 billion
Share of total foreign debt: 3.1%
9. Taiwan
Amount of U.S. debt: $131.9 billion
Share of total foreign debt: 3.0%
10. Russia
Amount of U.S. debt: $106.2 billion
Share of total foreign debt: 2.4%

Well I think its kind of scary considering China is on that list 3 times: Mainland China, Hong Kong, and Taiwan.  All together, we owe China 1161.7 billion, so thats over a trillion.  What if one of those nations on the list decide to collect the bebts we owe them? We wouldnt be able to pay up.  And if we cant pay in cash, what will they collect instead? Our territories maybe? What do yall think? Will we ever be able to pay off our debts?

This is the link
http://finance.yahoo.com/banking-budgeting/article/112189/who-owns-the-us?mod=bb-debtmanagement