Shipping is big business in Portsmouth and it's growing.Preview: Visitors to the U.S. Botanic Garden in the nation's capital could be in store for a stomach-turning treat this weekend. A spokesperson says two corpse flowers may bloom there this weekend. When they bloom, the rare Sumatran plants give off a smell like rotting flesh to help attract pollinating insects like beetles and flies. Corpse flowers are an endangered species and the botanic garden is helping with research to ensure their survival.