美联社新闻一分钟 AP 2013-07-23(在线收听

 1. Detroit has become the largest city in US history to file for bankruptcy. The State-appointed emergency manager has asked a Federal judge for permission to place the city into Chapter 9 bankruptcy protection.

 
2. A top defense official says the National Security Agency is implementing new security measures because of the disclosures by former NSA system analysis Edward Snowden. 
 
3. Ben Bernanke says it’s not the Federal Reserve's role to try to force Congress to take any particular action. But the Fed Chief has told the Senate Banking Committee that Congress could do more to help the US economy. 
 
4. The Journal Science says the sampling of the Martian atmosphere by the Curiosity Rover confirms it is mostly made of carbon-dioxide with hints of other gases.
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