Every year about this time, cities all over the world take part in a festival known as Carnival. America's best known Carnival celebration takes place Tuesday in New Orleans, Louisiana, where it's called Mardi Gras.
Whether it's in Nice, France; Rio de Janeiro; Trinidad or Mobile, Alabama the celebration always includes a colorful pageantry of floats, dancers and bands. On today's Dateline, we invite you to join in the fun of Mardi Gras.