Wuhan, 2010: Chinese farmer Yang Youde fires his homemade cannon on the outskirts of Wuhan, Hubei province. Yang uses the cannons, which are made out of a wheelbarrow, pipes and fire rockets, to defend his fields against property developers who want his land. Land seizures have been a problem for years in China, and have given rise to the term 'nail house' to describe a holdout tenant or occupant, likening them to a nail refusing to be hammered down

Photograph: AFP/Getty Images