Tuesday night’s Republican presidential debate featured a heavy dose of foreign policy. Sometimes the candidates got their facts wrong, and none of them staked out new positions on the issues. But th…

Nigeria has been added to a list of countries whose citizens will in some way be restricted from entering the United States. According to a White House statement, Nigeria is not complying with “the established identity-management and information sharing criteria assessed by performance metrics. Nigeria does not adequately share public-safety and terrorism-related information, which is necessary for the protection of the national security and public safety of the United States.”

New planet-changing geoengineering technology is available to help humanity combat an existential security threat. However, like atomic fission, this technology is not to be jumped at without caution…