On Friday October 19, 2012 at approx 3:00 p.m. these photos were taken. Serbia does not have any noticeable civilian air traffic to account for so many mysterious aviation trails even if it did so many planes in one place would be considered unacceptable safety risk! These types of activities take place on a regular time scale. The area these pictures were taken were next to mount kosmaj. This area has never had such aviation activity over 40 planes in about 2 hours.