By Humeyra Pamuk and Vladimir Soldatkin ISTANBUL/MOSCOW (Reuters) - Russia threatened economic retaliation against Turkey on Thursday and said it was still awaiting a reasonable explanation for the shooting down of its warplane, but Turkey dismissed the threats as "emotional" and "unfitting". In an escalating war of words, President Tayyip Erdogan responded to Russian accusations that Turkey has been buying oil and gas from Islamic State in Syria by accusing Syrian President Bashar al-Assad and his backers, which include Moscow, of being the real source of the group's financial and military power. The shooting down of the jet by the Turkish air force on Tuesday was one of the most serious clashes between a NATO member and Russia, and further complicated international efforts to battle Islamic State militants.
Kyle Edmund will make his Davis Cup debut for Britain on Friday when he joins Andy Murray in trying to hand their country its first overall success in the tennis showpiece since 1936. The 20-year-old South African-born player will become just the sixth man in the 115-year history of the competition to make his debut in the final when he plays the opening rubber in Ghent against Belgium's top player, David Goffin. Murray, the world number two and the inspiration behind Britain's march into the Davis Cup final for the first time since 1978, will then take on lowly-ranked Ruben Bemelmans, who will take centre stage after playing provincial club tennis in France last week.
LONDON (AP) — British Prime Minister David Cameron urged skeptical lawmakers to back airstrikes on the Islamic State group in Syria, saying Thursday that the Paris attacks have given the fight new urgency and Britain owes it to key allies to act.