These were pejoratively known as "cope cages"[12][13][14] due to skepticism over their effectiveness in combat. This armor was most likely designed in an attempt to mitigate the threat of top-down anti-tank missiles such as the FGM-148 Javelin and NLAW. In December 2021, the Ukrainian Army released video of a military exercise in which an armoured fighting vehicle (apparently a BTR mated to a T-64-like turret) protected by armour of this sort was destroyed by a Javelin missile.[15]