Pedro Arenas is afraid that they'll take flight again. "I expect it could be within the next months," he says. Since the end of last year, nine AT-802 firefighting aircraft have been deployed throughout the country. But their mission is not to put out fires. The planes are trying to eliminate a problem that has been causing bloodshed in Colombia for decades: cocaine. The planes are loaded with the controversial herbicide glyphosate. According to Colombian media, nearly 800 barrels of the chemicals are in stock from a Chinese manufacturer. If spraying resumes, "people in the remote communities will completely lose faith in the institutions and the peace process," Arenas believes. (See also:  The ‘deja vú’ of aerial crop spraying in Colombia)