A closer analogy was the Proton launch failure and subsequent suspension of launches in 2017, after it turned out that Voronezh Mechanical Plant had switched ma

A closer analogy was the Proton launch failure and subsequent suspension of launches in 2017, after it turned out that Voronezh Mechanical Plant had switched materials in the engines and falsified the documentation. https://arstechnica.com/science/2017/01/russia-recalling-dozens-of-rocket-engines-sacks-head-motor-builder/ https://arstechnica.com/science/2017/01/russia-recalling-doz...