The deputy director of the White House Military Office focuses primarily on the day-to-day support of the WHMO.

CENTERFORSECURITYPOLICY: Center For Security Policy

Asked for comment on the White House military office cyber attack, a Cyber Command spokesman referred questions to the White House.

CENTERFORSECURITYPOLICY: Center For Security Policy

The conservative Washington Free Beacon reported on Sunday that hackers linked to the Chinese government had breached the White House Military Office.

BBC: The White House as seen on 17 March 2010

Hackers linked to China's government broke into one of the U.S. government's most sensitive computer networks, breaching a system used by the White House Military Office for nuclear commands, according to defense and intelligence officials familiar with the incident.

CENTERFORSECURITYPOLICY: Center For Security Policy

One, when it comes to the Director of the White House Military Office, Mr. Caldera, does the President have any concerns that this decision he made, that he took responsibility for, indicates a lack of judgment that might make him improper to keep holding that post?

WHITEHOUSE: Press Briefing

U.S. officials familiar with reports of the White House hacking incident said it took place earlier this month and involved unidentified hackers, believed to have used computer servers in China, who accessed the computer network used by the White House Military Office (WHMO), the president's military office in charge of some of the government's most sensitive communications, including strategic nuclear commands.

CENTERFORSECURITYPOLICY: Center For Security Policy

And it takes everyone at the White House and the State Department and the Military Office who've worked so hard to put all of the events together today -- the guest list, the invitations, the place settings that you see here, you've got to figure out who sits where -- all that fun stuff.

WHITEHOUSE: First Lady Michelle Obama Discusses State and Official Visits | The White House