U.S.-supplied Himars have played a key role in Ukraine's counteroffensive against Russia. WSJ’s Stephen Kalin gained rare access to the mobile rocket launchers on Ukraine's southern front, where soldiers are targeting Russian equipment and troops. Photo/Video: Stephen Kalin Russia-Ukraine Conflict WSJ’s latest news coverage around the 2022-2023 Russia-Ukraine conflict. More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com/ Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #Himars #Ukraine #WSJ