Triple-canopy forest stretches to the horizon, cut by a silt-laden river winding through steep mountain valleys. This is the terrain that defined the air war in Southeast Asia: roadless, cloud-shrouded, and almost impossible to search from altitude. Douglas A-1 Skyraider crews flew low over country like this on interdiction and close air support missions and, on the "Sandy" mission, spent hours quartering these ridges hunting for a single downed airman. Faint pale lines on the slopes may be dirt tracks or trails, but nothing in this hazy, low-resolution frame identifies a specific location. Project: 219827