Out of an abundance of caution, NASA on Friday directed five of the seven crew members aboard the International Space Station to wait inside the docked SpaceX Crew Dragon "Freedom" spacecraft — known as a "safe haven" — while two cosmonauts work to make the latest repair to some cracks in a transfer tunnel in the Russian module. These cracks have been the source of a small air leak that has persisted on and off for the last six years or so. The leak is considered a top safety risk. There have