A US fighter jet has blown up a pro-Syrian regime drone, just two days after the US brought down its first Syrian air force warplane. No matter how much Mr Trump personally hankers after better relations with the Russians, the downing of the Russian-made SU-22 on Sunday night has effectively killed any prospect of Washington and Moscow enjoying a new era of detente. The Russian response has been to threaten any coalition aircraft which enters airspace where its forces operate. Meanwhile, an armed Russian warplane flew within five feet of a US reconnaissance aircraft over the Baltic Sea in what US officials said was a ‘provocative and unsafe’ way. Tensions between the two powers were already running high after a bipartisan group of US Senators last week voted overwhelmingly to pass a bill that expands financial sanctions in retaliation for Russia’s interference in last year’s presidential contest, as well as Moscow’s illegal annexation of Crimea in 2014.