Collins believed if fractious politicians could see the planet from space, their outlooks would be changed.
Arbery was shot dead while he was out for a run near his home last year, sparking fury and demands for justice.
President Biden’s attempt to resurrect the Iran nuclear deal, de-escalation of regional tensions on the agenda.
While the US president is currently riding high, history shows that there are plenty of pitfalls that lie ahead.

The tech giant reported second-quarter sales of $89.6bn, up 54 percent compared with the same period in 2020.