russia claims to be acting in self defence, but it was president putin who ordered his troops to attack ukraine. the kremlin started this. it s determined to end it on its terms. steve rosenberg in moscow. the russian company, gazprom, says it will halt the supply of gas to poland and bulgaria in the nexty few hours. both countries rely on gazprom for most of their gas imports. poland s state gas company has described the move as a breach of contract, but gazprom claims warsaw refused to pay in roubles, in line with new rules announced in march. i asked gregory brew, who s a postdoctoral fellow at yale university, what message russia was sending by cutting the gas supply. it s a very strong message to poland specifically, which as you pointed out has been very vocal, both during the war and in the past, when it s come to the question of europe s dependence