Please take a moment to check out Legistorm, a site that examines details about Congress that I had no idea were so easily available. I used it to see how many times my people in Congress had been to Israel.
Not only is a Google map provided showing the travels of each Representative and Senator, but staff travel can be examined as well. You can find out how much was spent, the purpose of the trip and, most important, who paid for the trip.
The user interface is a snap. Started in 2006, this is a very important resource for American citizens.