The U.S. has secretly modified the Himars rocket launchers it gave to Ukraine so they can’t be used to fire long-range missiles into Russia, U.S. officials say.
I was sceptical about it being real, but the WSJ (wall street journal) has now validated it, so I'll publish it now. (Link to the main article https://www.wsj.com/articles/u-s-altered-himars-rocket-launchers-to-keep-ukraine-from-firing-missiles-into-russia-11670214338