BIG BROTHER WATCH:National Security Agency has ability to collect, read domestic e-mails of Americans on widespread basis...

The National Security Agency is facing renewed scrutiny over the extent of its domestic surveillance program, with critics in Congress saying its recent intercepts of the private telephone calls and e-mail messages of Americans are broader than previously acknowledged, current and former officials said.

PICTURE LEFT:Kenneth L. Wainstein testified about surveillance in Fall 2007 at a Senate committee hearing.(Alex Wong/Getty Images)