There have been 4 major plane crashes in the US in 4 days. What is going on?

The phrase “what is going on” has become a trope with regard to aviation, signaling a complete drive-by lack of understanding of the industry. It could be a cluster illusion. It could be a conspiracy. It will be investigated, and the conclusions of those investigations should be the driving force in any procedural changes, not some facebook mom or CNN article.

Major? A Marine fighter jet, a skydiving plane carrying 12 people, an Air Force bomber, and a business jet carrying six people. In aviation terms, no, those are not major. They're tragic for the lives lost, but they're nothing like a plane carrying 100 people going down.