The vast majority of garments worn in Kenya are pre-owned from North America or Europe. Even yours truly wears a lot of them. They are a good deal, and if you buy from the right merchant, they're nearly new.
So about this colleague's shirt - I'm not sure he ever has flown a kite. (This shirt is advertising the American Kitefliers Association.) But he commented that he liked the "American" aspect of the shirt.
I cropped out his face, to protect the innocent.
I originally shot this photo for my friend Rob, who loves to fly kites.