The time it takes for sellers to build a good reputation and a high level of brand trust on any service platform is crucial because a verified history of good feedback and comments is essential for any customer to make an informed choice.

FORBES: How To Profit From Your Reputation

In the case of the Pope's visit, there was a high level of coverage but it was over a period of months and weeks - the build-up and so on.

BBC: Catholic Church in Scotland 'lacks support on sexuality'

Iran denies it is trying to build a nuclear weapon and has taken steps in recent months to reduce its stores of high-level nuclear material.

WSJ: Obama Sets Timeline on Iran Nuclear Bomb