At sundown Admiral Spruance authorized Task Force 58 to strike Honshu and Okinawa, then retire to Ulithi to prepare for the Ryukyuan campaign. All eight Marine Corps fighter squadrons thus left the Iwo Jima area for good. Navy pilots flying off the 10 remaining escort carriers would pick up the slack. Without slighting the skill and valor of these pilots, the quality of close air support to the troops fighting ashore dropped off after this date. The escort carriers, for one thing, had too many competing missions, namely combat air patrols, anti-submarine sweeps, searches for downed aviators, harassing strikes against neighboring Chichi Jima. Marines on Iwo Jima complained of slow response time to air support requests, light payloads (rarely greater than 100-pound bombs), and high delivery altitudes (rarely below 1,500 feet). The Navy pilots did deliver a number of napalm bombs. Many of these failed to detonate, although this was not the fault of the aviators; the early napalm “bombs” were simply old wing-tanks filled with the mixture, activated by unreliable detonators. The Marines also grew concerned about these notoriously inaccurate area weapons being dropped from high altitudes. By Friday, 23 February (D+4), the 28th Marines stood poised to complete the capture of Mount Suribachi. The honor went to the 3d Platoon (reinforced), Company E, 2d Battalion, 28th Marines, under the command of First Lieutenant Harold G. Schrier, the company executive officer. Lieutenant Colonel Johnson ordered Schrier to scale the summit, secure the crater, and raise a 54″×28″ American flag for all to see. Schrier led his 40-man patrol forward at 0800. The regiment had done its job, blasting the dozens of pillboxes with flame and demolitions, rooting out snipers, knocking out the masked batteries. The combined-arms pounding by planes, field pieces, and naval guns the past week had likewise taken its toll on the defenders. Those who remained popped out of holes and caves to resist Schrier’s advance only to be cut down. The Marines worked warily up the steep northern slope, sometimes resorting to crawling on hands and knees. Part of the enduring drama of the Suribachi flag-raising was the fact that it was observed by so many people. Marines all over the island could track the progress of the tiny column of troops during its ascent (“those guys oughta be getting flight pay,” said one wag). Likewise, hundreds of binoculars from the ships offshore watched Schrier’s Marines climbing ever upward. Finally they reached the top and momentarily disappeared from view. Those closest to the volcano could hear distant gunfire. Then, at 1020, there was movement on the summit; suddenly the Stars and Stripes fluttered bravely.