Trees creating a safety hazard for planes. The feds have been pushing the airport in Kirksville to cut down some tall trees…or lose some commuter flights to St. Louis. But, by this Thursday, the airport hopes to have all the trees down to meet the FAA’s demands. In mid-October the airport did a deal to get the trees down…ten of them, large oak and cottonwood trees. The cost of the tree removal is just over $4,000. The feds say they were so tall they cut down on pilots visibility.