Ryan heard the jets fly over once or twice as they hiked the kilometer to the border, but he couldn't see the aircraft through the jungle canopy, and he suspected the jet riggers would have just as hard a time spotting the camouflaged mercs. The jungle canopy was just too dense. They slowed to a snail's pace as the undergrowth thickened up ahead, and as Ryan watched, the people ahead of him simply disappeared through some sort of veil. Vanished into the shadows.