The Gospels attest that as Jesus entered the city, crowds lay down palm branches and cloaks as he rode into Jerusalem on a donkey. In the U.S. alone, nearly 18,000 Catholic parishes will celebrate Palm Sunday by blessing and distributing palm branches to the faithful. That makes millions of palm leaves each year - and that doesn't include all of the Protestant churches that observe the tradition. Thomas Sowell is one such palm harvester from Florida who has been helping to supply parishes with fresh palm leaves for more than five decades. Some of the trees Sowell harvests from have been producing palm leaves since he first started gathering palm leaves to sell as a boy.