When it is flown at half-staff because of a death or series of deaths, it should be first hoisted to the top of the pole for an instant and then lowered to halfway. The flag should be again raised to the peak before it is lowered for the day. "Half-staff" means lowering the flag to one-half the distance between the top and bottom of the staff. Crepe streamers may be affixed to spear heads or flagstaffs in a parade only by order of the President of the United States.

Here's one of the procedures least followed: When the flag is displayed in a way besides being flown from a staff, it should be displayed flat, whether indoors or out. When shown either horizontally or vertically against a wall, the union should be uppermost and to the flag's own right, that is, to the observer's left. When displayed in a window...
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