The errant quad copter may have been a tipsy accident but Obama has called for interested parties to come up with ideas balancing safety and commerceThe discovery of a 2ft-diameter drone in the grounds of the White House on Monday – its operator a government employee who told investigators he had been drinking – has led to renewed calls for comprehensive laws to cover drone use in the US.President Barack Obama said creating a framework for drone laws was one of his duties during his final two years in office.