Wonderful story of folks doing right by each other. Kinda helps restore ones faith in humanity.
(Pedant mode on) “arm and arm”? It’s arm IN arm, fcol.(/pedant)
“arm-in-arm”
There are no editors these days and even fewer capable teachers of English idioms. Lots of teachers of idiots, though...
This, my friends, is what we do as Americans. Stop, risk our lives, save a life, then get back in our cars and go home for a frosty brewski.