Director of National Intelligence James Clapper has submitted his letter of resignation.

Defense officials see cyberattacks as the greatest threat to U.S. national security, a survey released Monday says. Forty-five percent of respondents to the Defense News Leadership Poll named a cyberattack as the single greatest threat – nearly 20 percentage points above the second ranked threat: terrorism.

The current secretary of homeland security is resigning to become the new president of the University of California university system.

The latest report of Chinese cyber-espionage hits U.S. defense computers as the nation increases its defense budget and works to build an aircraft carrier fleet and stealth planes. 

The infamous demands for confidential records require no court approval and have previously come with a built-in gag order, but several rulings from the California have emboldened search giant Google to challenge the letters.