Thank you Wuzzie for this. Sorry if I annoyed you - it wasn't my intention. :-)
Anyway... Here in London I have plenty of friends from US, Canada or Australia who works with me on Intensive Care. They came to UK, just to work for a while and travel/see Europe at the same time. So, they encouraged me to do the same - but the other way round - come to US, work for few months, and see the country. So, if there is anyone here, who knows and had some experience wit "Assignment America" or other agencies - please share... :-) thanks