Is the SEC Covering Up Wall Street Crimes?

For a shorter article with a not as sharp axe: http://www.nytimes.com/2011/08/18/business/sec-illegally-des...

Is there a statute of limitations on white collar crimes like these?

Biggest crimes covered up by the SEC:

1) 9/11 Shorting of Airline Stocks

2) S&P Downgrade of US

3) Bernie Madoff

How much more proof do people need? The game is rigged folks.