This is more of a general discussion, but I just wanted to put this out there. A lot of timelines are based on a public figure (such as the President of the United States) dropping dead, often of a heart attack, at a convenient (for the writer, not the president) chronological point. Now it's not that a lot of public figures don't have heart attacks, fatal or otherwise, but I just want to suggest that I think there are better ways to achieve this. Ditto for assassination--there are lots of assassination attempts, but few that are competently executed enough to succeed.
Why are transport accidents so underused as PODs of this type? There are plenty of leaders and non-political celebrities who have died in plane crashes. The very first railway accident killed a British government minister. Churchill was nearly killed in New York in the 1930s by a car accident. I'm just saying that if you want to start a TL based on the POD of a public figure dying, this might be a better option than a conveniently timed heart attack. Especially if your TL is based on them dying at a politically volatile time--you can argue that would make a heart attack more likely, perhaps, but it's also much more likely to make them not take care when rushing to an urgent appointment and end up being run over or something.
Thoughts?