In order to prove how wonderful hydrogen fuel cell cars are, Rep. Eric Massa (D-N.Y.) decided to drive one from New York to Washington DC for his congressional swearing in. But the fuel cell car has a range of under 200 miles, and the trip for NY to DC is 300 miles. So here's what he did:
Massa drove one fuel cell car while a hybrid SUV [Chevy Tahoe] towing an additional SUV followed along. Once he got half way, he switched to new fuel cell car [which I assume was towed to the half way point sometime earlier so that it would be waiting for the environmentally-conscious congressman]. The empty fuel cell was then towed back by the first SUV. As he continued on his journey, the second SUV followed. Once Massa arrived in DC, the second SUV then towed the second fuel cell car back to NY.