 Russia has found a way to interfere with Himmars rockets. Russia has found a way to interfere with GPS guided artillery rounds, including munitions for US-made Himmars, multiple rocket launchers. Defense Minister of Ukraine Alexei Reznikov has claimed when those systems first arrived on Ukrainian battlefields last year, they were highly accurate. Reznikov recalled in an interview with the Financial Times. However, Russia, which has strong radio-electronic systems, eventually found a way to jam GPS-guided artillery and Himmars projectiles he acknowledged. It is like a constant pendulum. This is a war of technology, the minister said, describing the ongoing conflict between Kiev and Moscow. The Russians come up with a countermeasure. We inform our partners and they make a new countermeasure against this countermeasure. He explained. Reznikov reiterated Kiev's earlier claim that for the military industry of the world, you can't invent a better testing ground than Ukraine. Kiev's Western backers can actually see if their weapons work, how efficiently they work, and if they need to be upgraded, he said. Ukraine has been supplied with several dozen Himmars, which have a range of 85 kilometers by its foreign backer since June last year. Western outlets described the system as a game changer in the conflict. In May, CNN reported, citing five sources from the US, Britain and Ukraine, that the US-designed multiple rocket launchers had been rendered increasingly less effective from the intensive blocking by the Russian forces. The electronic jammers throw off GPS-guided targeting system of Himmars rockets to cause them to miss their targets, the channel said.