A pilot incapacitated, a crash landing and a close call. What we know about the latest aviation incidents | CNN

A pilot suffering a medical emergency, a plane forced down in Alaska and passenger jets nearly colliding in Boston are the latest aviation incidents under investigation as the busy summer air travel season gets underway. While each incident is vastly different, all could be frightening for passengers planning to fly as America rings in its 250th anniversary. The Transportation Security Administration expects to screen nearly 18.7 million travelers at US airport security checkpoints over the busy Fourth of July weekend, between June 30 and July 6. The latest incidents also come just weeks after four plane crashes happened in four days in the US. None of the crashes were related, but 21 people were killed. Passengers should feel safe on planes; however, these incidents happen all over the world, according to Ed Pierson, executive director of the Foundation for Aviation Safety. “What you really need to do is you need to investigate these and you need to go, ‘OK, what happened, how can we fix it, (and) let’s not make that mistake again,’” he said. Here’s what we know about what is happening in the skies. The pilot of Air Canada Flight 7664, traveling to Halifax, Nova Scotia