Re- breaks.
The leader CANNOT always be in view of the wingmen
I'd argue that usually he SHOULD and that, as Dan suggests, this is why the echelon break is the safe convention. Most others involve either a crossover or out-of-sequence affair which are 'less' safe from close, and normally need specific briefing. That said, I'd acknowledge that for professional teams, any version is acceptable.
Let's just be thankful that the P51 guy got out and the Skyraider survived too
Amen to that!