Bulletin sent on 18 March said Russian hackers could access messages as Trump officials now downplay blunderUS politics live – latest updatesThe Pentagon recently warned its employees against using Signal, the encrypted messaging app, due to a technical vulnerability, an NPR report reveals.The rep ort comes one day after the Atlantic published a story detailing how top national security officials, including the US vice-president and US defense secretary, had accidentally added a journalist to a Signal group chat, which revealed plans for military strikes in Yemen. Continue reading... ...read more read less