In this photo taken Friday, Feb. 20, 2015, a man walks his dogs beneath a year-old billboard from last year wishing Zimbabwean President Robert Mugabe a happy 90th birthday in Harare. Mugabe marks his 91st birthday Saturday Feb, 21, 2015, with his supporters saying they will back him to run his full term until 2018 and beyond despite nagging questions about his health and an economy that is crumbling under his watch. (AP Photo/Tsvangirayi Mukwazhi)
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