Rick Steves's Italy 2009 travel book states that travelers must have a US Passport valid for at least six months after the date of return from Italy, but the US Dept of State website says three months. Which is correct?
From the USDS website: "ENTRY/EXIT REQUIREMENTS: ...U.S. citizens may enter Italy for up to 90 days for tourist or business purposes without a visa. The passport should be valid for at least three months beyond the period of stay....." (http://travel.state.gov/travel/cis_pa_tw/cis/cis_1146.html#entry_requirements)