A quick google gave me this as a top result: https://www.npr.org/2022/02/21/1082124528/ukraine-russia-put...
We should have given them this support when Russia took crimea, but didn't. The least we can do now is follow through on our agreement.
(Plus all of the other reasons in this thread -- there are fantastic reasons for the western nations to support Ukraine's defense separate from those I'm referring to here)
I do not understand how those machines work.