Would you please explain the function of "over" in the sentence below? In other words, does it have a real meaning or is it just a colloquialism? Also, would the meaning of the same sentence change if I omitted "over"?
CNN decided to send a crew over to do a piece on the bus accident.
The meaning would be the same without the word "over."
"Over," in this context, just means over land, over sea, or whatever terrain, to get to where the person you are talking to is.
Often the destination is more specifically stated, like "I'll send someone over to your house to deliver it," but that too is basically implied in most cases.