From www.ushistory.org FAQ section...

I was told there are 5 places the flag is never lowered to half staff.
We receive this question periodically. The five proposed locations are:

The Betsy Ross House (false, it is half-staffed)
The Alamo (false, it is half-staffed*)
USS Arizona at Pearl Harbor (false, it is half-staffed)
The Tomb of the Unknown Soldier, in Arlington (false, it is half-staffed when others are, and, in addition, it is lowered to half-staff 30 minutes before each funeral)
The Moon (true)

A flag, however, is never half-staffed on the battlefield. There are locations so remote that it is not lowered to half-staff. And, half-staffing the flag is done on a voluntary basis by citizens, so there are certainly many flags that are never half-staffed. However, there are no locations where the flag is not half-staffed by Congressional or Presidential authority.

*This is from the reference librarian in San Antonio, Texas: "I have had this question before, and I'm not sure which website makes that statement. The flags at the Alamo are indeed flown at half-staff whenever the federal, state, or city governments make the request. The Alamo Rangers are in charge of raising and lowering the flags and follow proper flag etiquette."

These flags are on the moon.

The first of these U.S. flags were deployed to the moon on July 20, 1969 by NASA astronauts. There are a total of 6 US flags deployed to the moon surface, one for each visit to the moon (Apollo 11, 12, 14, 15, 16 & 17). We can only assume they are still standing and were not knocked down when the lunar modules' engines fired.



So I guess NASA is considered military personnel?