What do City and Charlton have in common?

You'll have to read this interesting and reflective blog essay to find out, although they do both owners from the Gulf emirate of Abu Dhabi: Transfer window from hell

A hint: 'The chasm may stretch more than 200 miles, 4,141 days, and one division, but the situation on the blue side of Manchester that fateful day [in 2008] is not too different from the current predicament at The Valley.'