Protester takes aim at riot police with a slingshot during a May Day demonstration in Istanbul

A protester (C) takes aim at riot police with a slingshot during a May Day demonstration in Istanbul May 1, 2014.

A protester (C) takes aim at riot police with a slingshot during a May Day demonstration in Istanbul May 1, 2014. REUTERS/Murad Sezer (TURKEY – Tags: POLITICS CIVIL UNREST)

Riot police clash with May Day protesters in Istanbul