Jan 25, 2001, Henri de Yampert, who had been waging war against Alabama's Army Air National Guard was found guilty of air sabotage for shining a spotlight into the cockpit of approaching aircraft. Yampert was charged with using a flash light to sabotage military aircraft on approach on three separate occasions last year, however a federal jury found Yampert guilty in only one of the incidents. Yampert could be sentenced up to 20 years in prison. Prosecutors reported the case was unique in that this was the first air sabotage trial in the US involving a spotlight. Yampert, who lives near Montgomery's Dannelly Field, was charged in August 2000, in U.S. District Court in Montgomery, Alabama under the Air Sabotage Act for waving a flashlight at a military jet.

He had pleaded not guilty.  Yampert, has long complained about military aircraft flying to low over his house has on numerous occasions shined spotlights and red laser lights into the cockpit of military planes at night while on approach to land in retaliation. Yampert, would attempt to prevent aircraft from landing by binding or interfering with the pilots ability to control their aircraft. Yamperet was known locally by residents for having Christmas tree lights on the roof of his house spelling out "NO FLY" in letters. Montgomery Regional Airport (Dannelly Field) is a "joint use" facility used by civilian and military aircraft (Alabama Air National Guard’s 187th Fighter Group).