As spring makes its slow return to the hemisphere, the Smithsonian Institution's Natural History Museum in Washington, D.C., is marking the occasion with one of its most popular exhibits - the Live Butterfly Pavilion. Now in its fifth year, the Pavilion is a warm, lush enclosure filled with beautiful flowering plants, in which visitors interact with hundreds of live butterflies, representing species from around the world. As VOA's Julie Taboh discovered, it's an exhilarating experience.