“Was it the U.S. governments job (official business) to ferry the two NY senators to NY for photo opportunities?”
In a word, yes. A state’s senators are the elected, Federal-level representatives of the people of that state. In an emergency which effected interstate travel, it is not beyond reason to assist representatives to get back to their home districts. Especially when that district is where the emergency happened.
It sounds like your reply was written by Nancy Pelosi! The only effort they expended on 911 was raising funds and Photo Ops!