In July and August 2013, Russia's new anti-gay bill sparked international protest and outrage. Athletes throughout the world threatened to boycott the 2014 Olympics in protest. The International Olympic Committee began probing Russia to see how the country would enforce the law during the Olympics. In an effort to do damage control over the controversy, the International Olympic Committee said by late July that it had "received assurances from the highest level of government in Russia that the legislation will not affect those attending or taking part in the Games." On July 31, protesters gathered outside the Russian consulate in New York City and called for a boycott of the 2014 Olympics as well as sponsors of the Winter Games by dumping several cases of vodka. On August 10, hundreds gathered in London near the residence of Prime Minister David Cameron and demanded that the government pressure Russia into repealing the law. On August 1, 2013, Vitaly L. Mutko, Russia's minister of sports, said to R-Sport, a state news agency, that gay athletes were welcome to attend the Winter Olympics in Sochi. However, Mutko pointed out that all athletes participating in the games would be expected to obey the new law and that no athlete or attendee could promote any nontraditional sexual orientation. On Sunday, December 29, 2013, at least sixteen people were killed in a suicide bombing at a railroad station in Volgograd, a city in southern Russia. Nearly three dozen others were wounded. The following day another suicide bombing took place on a trolley bus in the same city. At least ten people were killed and ten others were wounded. Both explosions came just six weeks before the Winter Olympics were being held in Sochi, 400 miles away from Volgograd. Never has a host country experienced this level of violent terrorism so close to the Olympic Games. During the Olympics, the government has planned for more than 40,000 law enforcement officials to be on hand at the event.