The waiting game proved to be just as disastrous for the enemy as had his previous strategy. The month of March was marked by clear skies over Khe Sanh and there were only five days during which weather hampered flight operations. While the overcast had never interfered with Arc Light strikes or TPQs, the retreat of the monsoons was a blessing for the attack pilots and fighter/bombers swarmed into the valley like locusts. The number of close air support sorties in March almost doubled the amount flown the previous month. Any enemy movement within the TAOR during the day invariably drew a flight of sleek jets, prop-driven A-1 Skyraiders, or helicopter gunships within minutes. The trenches and bunker complexes inside the B-52 line were also worked over daily to insure that the NVA stayed at arm's length. What's more, the unrestricted visibility enabled the TAC(A)s and airborne observers to ferret out and call in artillery on the enemy gun positions which had been hammering the base. For the most part, 1/13 had been limited to intelligence-generated concentrations during February, but the good weather in March provided Lieutenant Colonel Hennelly's men with something they could sink their teeth into--observed targets. Enemy gunners no longer enjoyed a reprieve and each round they fired was an invitation to instant retaliation. With Birddogs or Hueys overhead, the enemy seldom even fired and this was no small consolation to the men at the base. The clear skies and accurate supporting fires were a potent combination and the number of confirmed enemy dead recorded in March increased approximately 80 percent over February.(190) The enemy's plight at Khe Sanh was echoed, albeit in veiled terms by his propaganda broadcasts. The Radio Hanoi, English-speaking announcer, Hanoi Hanna--the Communist's anemic version of Tokyo Rose--gradually shifted her theme from, "We will crush Khe Sanh" to "Ho Chi Minh would be unhappy if we wasted our time on only 6,000 Marines." The Communists also attempted to sell the line that 20,000 North Vietnamese had "tied down" the 26th Marines. Such rationale smacked of sour grapes. This illogical reasoning would be similar to a defeated football coach saying that he didn't really want to win the game, only keep the other team "tied down" for an hour or so. At the KSCB itself, there were a few feeble attempts to sway the defenders. On 10 March, an incoming mortar round released about 200 propaganda leaflets. The following day, an NVA loudspeaker blared a message to the 37th ARVN Ranger Battalion which invited the South Vietnamese to "join their brothers from the North in driving out the Americans." There were no takers. The psychological effort was just one more indication that the enemy was hurting.(191)