Passage: By noon, troops entered the White House and began to occupy it, floor by floor. Rutskoy's desperate appeal to Air Force pilots to bomb the Kremlin was broadcast by the Echo of Moscow radio station but went unanswered. He also tried to have the Chairman of the Constitutional Court, Valery Zorkin call the Western embassies to guarantee Rutskoy's and his associates' safety - to no avail. Hostilities were stopped several times to allow some in the White House to leave. By mid-afternoon, popular resistance in the streets was completely suppressed, barring occasional sniper fire.

Question: What time of day was it when they started to enter the white house?
noon