He had more success with efforts to curb carbon emissions and used his own money to start a national movement for gun control.  Respected by New Yorkers, if never adored — with a fortune estimated by Forbes at $38.6bn, he was not exactly a man of the people — Bloomberg won admirers for his drive.  He was the mayor who got things done.

When he left office, Bloomberg, now 73, seemed content with full-time philanthropy.  But, as the months went on, it was clear he had unfinished business at the company he co-founded in October 1981.  By the time of the anniversary party, he had resumed duties as chief executive.  After more than a decade in exile, the king had returned home.

 Read the full story here:  https://www.ft.com/content/58cbff4e-732e-11e5-bdb1-e6e4767162cc

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