Interesting...
White House Communications Agency (WHCA) was originally known as White House Signal Corps (WHSC) and then the White House Signal Detachment (WHSD). It was formed in 1942 under FDR. In 1954 under Eisenhower it was reorganized under the Office of the Chief Signal Officer, Army Signal Corps as a Class II unit and renamed the White House Army Signal Agency (WHASA). Then in 1962, WHASA was discontinued by order of the United States secretary of defense under President John F. Kennedy. Its duties were transferred to the auspices of the Defense Communications Agency under the operational control of the White House Military Office, and reestablished as the White House Communications Agency.
Another interesting tide bit is WHCA was also a key player in documenting the assassination of President John F. Kennedy and the attempted assassinations of presidents Gerald Ford and Ronald Reagan. Richard Nixon awarded the agency the Presidential Unit Citation in recognition of their performance during his 1972 visit to China.