Two days after a deadly terrorist attack on a concert hall on the outskirts of Moscow that left more than 130 people dead, people across Russia have paid tribute to the victims, with mourners lining up to lay flowers at the site of the attack. The line of people to the improvised memorial site at the fence around the Crocus City Hall event centre stretched for several hundred metres, Russian state news agency TASS reported. Sunday had been declared a national day of mourning in Russia. A burning candle against a dark background could be seen on the largest illuminated billboards in the Russian…