This administration always excuses its obsession with secrecy by citing national security.
Citing security, defense officials said they could not reveal how many were being dismantled.
Eisenhower cited national security, land access to energy supplies, at times of war.
Israel cites security as the reason for the visa denials.
But as is now the White House practice, officials will provide no further details, citing security.
Citing national security, the Canadians do not refer directly to information provided by foreign intelligence services.
They also cited the same concerns as their parents: government corruption, security and the pace of reconstruction.
The building's owners cite security as the reason for the continued closure.
Citing security, officials would not discuss the exact location, number or dimensions.
The party cited publicity and security as central reasons for the flip-flop.