Razor 02, which had been diverted to Gardez as Razor 01 was landing on Takur Ghar, returned with the rest of the quick-reaction force at 0625 hours. Razor 02 inserted the other half of the QRF with its force of 10 Rangers at an offset landing zone, down the mountain some 800 meters (2,600 ft) east and over 610 meters (2,000 ft) below the mountaintop. The Rangers' movement up the hill was a physically demanding 2-hour effort under heavy mortar fire and in thin mountain air. They climbed the 45-70 degree slope, most of it covered in a meter (3 ft) of snow, weighted down by their weapons, body armor and equipment. By 1030 am local time, the men covered half of the 50m distance to the enemy positions when they were engaged by PKM fire. They were exhausted and the enemy at the top of the hill a mere 50 meters (160 ft) from their position. Meanwhile, the Rangers on the peak called in several Danger Close gun runs from orbiting F-15E and F-16C aircraft to suppress the enemy before again attempting another ground assault. However the Ranger commander realized that what they had assumed was fallen logs foliage was actually a fortified bunker. He ordered his Rangers to withdraw as they did not have enough men to start clearing them and other prepared positions. The attached USAF CCT vectored in airstrikes to keep the al-Qaeda forces at bay until the rest of the Rangers arrived; the CCT directed a number of strikes on the peak, which were well within the normal safety limits and he also called in a strike from a MQ-1 Predator UAV (which was the first recorded use of the vehicle), one of the two Hellfire missiles it fired collapsed the bunker. As the ten men of Razor 02 arrived, the Rangers prepared to assault the enemy positions. As the Air Force CCT called in a last airstrike on the enemy bunkers and with two machine guns providing suppression fire, seven Rangers stormed the hill as quickly as they could in the knee-deep snow - shooting and throwing grenades. Within minutes, the Rangers took the hill, killing several al Qaeda fighters.