A genetic condition that causes lifelong anemia, sickle cell affects millions worldwide, most commonly people of African descent. In Cameroon and parts of Africa, the disease is highly stigmatized and often attributed to witchcraft.
The busiest international crossing in the United States is in Detroit. Each year more than $200 billion worth of trade crosses the border there. Those trucks drive across the Ambassador Bridge--which is privately owned. The bridge is old and congested.