Flowers adorn the shields of Interior Ministry members and riot police standing guard in a line during a rally held by supporters of EU integration in Kiev December 1, 2013. Ukrainian opposition leaders called on Sunday for President Viktor Yanukovich and his government to resign at a rally of about 350,000 people, the biggest protest in the capital Kiev since the "Orange Revolution" of nine years ago. REUTERS/Valentyn Ogirenko (UKRAINE - Tags: POLITICS CIVIL UNREST)