This puts a pretty strong asterisk on other comments speculating that these probably aren't for Yemen, since they'd be overkill. They are overkill, but also we'

This puts a pretty strong asterisk on other comments speculating that these probably aren't for Yemen, since they'd be overkill. They are overkill, but also we've used them in cases where better-scoped and cheaper solutions would have done the job, before. As for comments like "why move them there, they're built for attacking from the US?": sustained strikes. The mission in the linked article had the crews awake 33 hours and put tons of strain on their aircraft, all of which would lengthen the time to a follow-up flight to, I'd guess, several days at least. You do this if you are planning to (or want it to look like you're planning to) use the aircraft several times in within a single week.