US National Security Agency (NSA) Director General Keith Alexander uses a library card as an example while testifying before the Senate Judiciary Committee in Washington December 11, 2013.[Photo/Agencies]

WASHINGTON — The NSA chief says he knows of no better way his agency can help protect the US from foreign threats than with spy programs that collect billions of phone and Internet records from around the world.

Pleading with the Senate Judiciary Committee to not abolish the NSA bulk-collection programs, Gen. Keith Alexander said Wednesday that global threats are growing — specifically in Iraq and Syria — that pose what he called "an unacceptable risk" to America.

He said the NSA knows of no other way to connect the dots between a foreign terror threat and a potential attack on the U.S.

Alexander said the NSA is open to talking to technology companies for a better solution without compromising security.

The programs were revealed last summer by leaker Edward Snowden.