A Russian fighter jet prepares for a mission to attack Ukraine. Russian Defense Ministry/Handout/Anadolu via Getty Images Russia's new cruise missile is full of Western parts, Ukraine's military intelligence agency said. Components for the S-71 missile are sourced from the US, Germany, and other countries, it said. It highlights the challenges of preventing foreign parts from ending up in Russian weapons. Russia's new cruise missile is built with parts sourced from the West, according to a Ukrainian intelligence assessment published on Monday. The new Ukrainian assessment highlights the challenges of sanctions enforcement and the continued difficulties that the West faces in preventing critical components from ending up in Russian weaponry. Ukraine's military intelligence agency, known as the GUR, revealed that the S-71K "Kovyor" cruise missile contains electronic components sourced heavily from overseas, from the US, Germany, Ireland, Switzerland, Japan, Taiwan, and China.…