Franken sworn in as U.S. senator

WASHINGTON (CNN) - Satirist-turned-politician Al Franken was sworn in as the newest member of the U.S. Senate Tuesday, officially closing the books on one of the longest post-election recount struggles in recent American political history.

Franken, a Minnesota Democrat, became the 60th member of his party's Senate caucus. The Democrats now have a potential filibuster-proof majority in the chamber.