NSA Director Says Surveillance Program Has Thwarted 50 Terror Plots

At least 10 targeting the United States

WASHINGTON—National Security Agency Director Keith Alexander told a House committee Tuesday that 50 terror threats in 20 countries have been disrupted with the assistance of two secret surveillance programs that were recently disclosed by former defense contractor Edward Snowden.

At least 10 of the plots targeted the U.S. homeland, Alexander told the House Intelligence Committee, including a plot to bomb the New York Stock Exchange.