remaining American forces dug in and fortified their lines. At precisely 16:00, the first wave of B-52 carpet bombings fell at YA 8702 (about 7 kilometers west of LZ X-Ray), aiming mainly to strike the units of the 32nd Regiment that were located about 5 kilometers further west and would carry on for 5 consecutive days. Lt. Col. Nguyễn Hữu An was on his way from his forward command post to the LZ X-Ray to meet with Lã Ngọc Châu, 7th Battalion interim Commander, when he first saw the waves of B-52 carpet bombings raining down. Air Cavalry units at the scene reported seeing three .50 caliber machine gun positions firing at the aircraft that were directly in path of strike. General DePuy, J3/MACV, who executed this B-52 airstrike stated that "this is the fastest a strike of this nature had ever been laid-on." At 16:30, Brigadier General Knowles, 1st Cavalry Division (Airmobile) Forward CP Commander, landed at the LZ X-Ray to announce the withdrawal of the 1st Battalion, 7th Cavalry set for the next day. At 20:40, 1st Air Cavalry requested for second B-52 strike with primary targets set for YA 830050, YA 850050, YA 843000 and alternative set for YV 890980, YV 910980, YV 890950, YV 910950. Around midnight, Moore received from Lt. Colonel Edward C. (Shy) Meyer, 3rd Brigade executive officer, a message saying that Westmoreland's headquarters wanted him to "leave X-Ray early the next morning for Saigon to brief him and his staff on the battle." He vehemently objected to the order and was allowed to remain with his battalion until its withdrawal planned for the next morning. Day 3: November 16 The American lines at X-Ray were harassed during the night of 15 November by PAVN probes. Shortly before 04:00 of the third day grenade booby traps and trip flares set by Diduryk's Bravo Company (2/7) began to erupt. At 04:22 the PAVN launched a fierce assault against Diduryk's men. Bravo fought off this attack by an estimated 300 PAVN in minutes. A decisive factor in this stand, in addition to rifle and machine gun fire from B Company's lines, was the skilled placement of artillery strikes by Diduryk's forward observer, Lt. Bill Lund. Making use of four artillery batteries, Lund organized fire into separate concentrations along the battlefield with devastating consequences for the waves of advancing PAVN. The PAVN repeated their assault on Diduryk's