Bomb plots targeting the New York Stock Exchange and the city's subway were among more than 50 terrorist acts worldwide thwarted by top-secret surveillance programs since the 2001 al Qaeda attacks on the United States, security officials said Tuesday.

The Pentagon unveiled plans Tuesday for fully integrating women into front-line and special combat roles, including elite forces such as Army Rangers and Navy SEALs.

A bipartisan group of senators is scrambling to reach a fresh compromise they hope can propel a proposal to overhaul U.S. immigration policy toward passage in that chamber and provide momentum heading into the Republican-controlled House.

Roughly half of all Americans now think the White House was behind the Internal Revenue Service decision to target conservative political groups -- a growing belief at odds with information recently provided to CNN by congressional investigators.

Many Americans know that Douglass was born a slave in Maryland in the early 1800s and later wrote an autobiography "Narrative of the Life of Frederick Douglass, An American." His tale of escape from bondage to statesman, abolitionist and activist in the women's suffrage movement is also fairly well known. Here are five things you might not know about him: