Lifted from the LJ of veedub:



The flag should never be displayed with the union down,
except as a signal of dire distress in instances of extreme danger to life or property.

—THE FLAG CODE, Title 36, U.S.C., Chapter 10, § 176 (a).
As amended by P.L. 344, 94th Congress, approved July 7, 1976.

I am posting this on my LiveJournal in opposition to The Patriot Act, which represents an extreme danger to the life, property and liberty of all persons living in the United States.