Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Yes, a European debit card works in the USA for purchases and ATM withdrawals, but all the transactions will be in dollars only. Your bank will do the conversions. There are foreign transaction fees (typically 1-3%) and potentially ATM fees.