1.   Planes skimmed the treetops as they flew in with tanks full of water to put out the fire.

2.   They can also skim treetops to avoid detection on radar.

3.   Pilots skim the treetops to avoid the sweep of U.S. radar based in Leticia and upriver in the larger Amazon port of Iquitos, Peru.

4.   Drug pilots have switched to much smaller planes, skirting the radars by flying east into the vastness of Brazil or evading them by skimming the treetops.