Be aware some scanners sold in Europe can receive the 800MHz band. In the USA this band is disabled for the same receivers (ICOM etc), and illegal not to be. It was to stop people listening to Analogue Cellular. I'm pretty sure it is still in force, even though the band is now used mainly by digital cellular, which can't be listened into using a simple scanner. So be carefull what you take to the USA.
CC