BANKING; Charges for Accounts Grow More Expensive - New York Times
"From California to New York, bank customers are facing higher fees for that staple of modern life, the bank account."
If they were talking about just bank customers in California, then the sentence would probably start like:
"In California, bank customers are facing...", where "in" must be added.
So, this means I could get away with dropping location prepositions when writing about a range of locations?