Evidence is mounting that Elon Musk's decision to deny Russian forces access to his Starlink satellite-based internet service has blunted Moscow's advance, caused confusion among Russian soldiers and handed an advantage to Ukraine's defenders. But for how long? And what can Ukraine's military achieve in the meantime? "The Russians… lost their ability to control the field," a Ukrainian drone operator who goes by the callsign Giovanni told us. "I think they lost 50% of their capacity for offence,"