 which could result in a lack of oxygen to passengers. Boeing called for visual inspections in June. That's CBS's Camille McCormick reporting. And med students at Johns Hopkins University won't have to worry about paying tuition thanks to Bloomberg Philanthropies. The group gifted a billion dollars to the school to cover tuitions for families earning less than $300,000 a year. Some living expenses and fees will also be covered. Average student loan debt for graduating doctors is more than $100,000. This is CBS News.