Eiffel Tower Celebrates A 'Green' 120th Birthday [audio 2 minutes 37 seconds]

The Eiffel Tower in Paris is celebrating its 120th birthday. To mark the occasion, the city is putting on a free sound and light show every night for the next two months. It takes place on the facade of the tower that faces the Seine River. The show is environmentally friendly because it is powered by LED strobe lights. It took more than a month to attach the lights to the tower's girders.