Red Dust — Eric Helm

From dawn to dusk, nothing moves on the highways from Hanoi to the DMZ. Weeks have passed since Navy pilots spotted daytime enemy traffic. The Americans are baffled by this recent NVA tactic. But the capture and interrogation of a Vietcong student reveals that her village in North Vietnam is a staging area for NVA troops. And recon photos support this. U.S. Army Special Forces Captain Mack Gerber and a team of Green Beret commandos undertake a covert action mission to the North to plant some "tulips" along key routes. These seismic intrusion devices will pinpoint target data on nighttime enemy movement for the USAF Phantoms. Despite this U.S. counterthrust, Gerber knows that the night belongs to Charlie.