Slow travel: Bridges are saving Costa Rican sloths from road death

There are millions of sloths in Costa Rica. But with high levels of deforestation over the past few decades and increasing contact with humans, the population is taking a hit. While no official stats about the sloth population exist in the country, many believe huge numbers are killed on roadways. As Jamie Fullerton reported last winter from Costa Rica's Caribbean coast, conservationists are building "sloth bridges" in an attempt to keep the animals safe.