351 Old Mill Road, in Valencia, was the location where one of Abu Fayed's terrorist cells prepared attacks in the Los Angeles area. Suicide bomber Nasir Trabelsi prepared for his attack on the Los Angeles Subway from this warehouse. This warehouse was also the location of one of Fayed's five suitcase nukes. At 9:58am, during a CTU raid, Hasan Numair detonated the bomb leveling everything in a 1 mile radius and killing at least 12,000 people.
By 12:30am, the estimated death toll had risen to 13,000, though this may be including the victims of previous attacks.