Thanks, everyone! Maybe I will get a Swiss Army Knife while in Switzerland. Do you think they have special editions sold only over there?

Things I've discovered that could be useful for other Americans traveling abroad:

• Sign up for Smart Traveler Enrollment Program (STEP), run by the State Dept. They'll notify you when bad things happen. https://step.state.gov/step/
• Credit cards! Call your credit card company so let them know your travel plans so they don't disable your card when they get a charge from wherever. Also, learn about "foreign transaction fees" and such: http://europeforvisitors.com/europe/articles/atm_conversion_fees.htm
• I read about the different ways in which people used SW radios while traveling, and I think my chances of needing SW while in a major city in Switzerland is nearly nil. It seems like SW is useful when (1) you're in a place with poor infrastructure; (2) you're in a place that could suffer blackouts or internet outage; (3) you're in a country that might cut your information off.