In case you were wondering… Title 36, Section 10 of the U.S. Code specifies that the flag shall be flown at half-staff:
* Thirty days from the death of the President or a former President;
*Ten days from the death of the Vice President, the Chief Justice or a retired Chief Justice of the United States, or the Speaker of the House of Representatives;
*From the day of death until interment of an Associate Justice of the Supreme Court, a Secretary of an executive or military department, a former Vice President, or the Governor of a State, territory, or possession; and
*On the day of death and the following day for a Member of Congress.