Shankar Vedantam is the host and creator of Hidden Brain. The Hidden Brain podcast receives more than three million downloads per week. The Hidden Brain radio show is distributed by NPR and featured on nearly 400 public radio stations around the United States.
Voting concludes Tuesday in Pennsylvania's presidential, U.S. Senate and U.S. House primary contests. Polls close at 8 p.m. ET. Follow the live results.
The British government has pushed the plan as a way to deter asylum-seekers from taking boats to Britain. But the U.N. human rights office has warned aviation authorities not to take part.