Kroenke takeover: The single biggest question is this - why now?

Arsenal’s majority shareholder Stan Kroenke has made an offer to take full ownership of the club in a deal which values the Premier League outfit at £1.8bn (€2bn). The American’s company, Kroenke Sports and Entertainment (KSE), currently owns 67% of the Gunners and has offered to purchase the 30% held by Alisher Usmanov’s Red and White Securities firm.

So, who is Kroenke and how long has he been involved with Arsenal?