On 15 August 2011 a US Air Force C-130 cargo plane collided with a RQ-7 while on approach to FOB Sharana in Paktika Province, Afghanistan. The C-130 made an emergency landing with damage to two engines and one wing, while the RQ-7 was destroyed completely. The collision caused the cargo aircraft to be grounded for several months while being fixed, while the RQ-7 wreckage was never recovered. Early reports indicating that the mishap occurred when the C-130 took off without clearance were incorrect. The investigating board determined that the mishap was largely due to poor local air traffic control training and supervision.