The Trump administration boosted its request for air traffic control funding to $50 billion late Friday (local time) after a communications issue forced a nationwide groundstop that halted thousands of flights for hours.Transportation Secretary Sean Duffy and the White House earlier on Friday asked for $30.1 billion to upgrade the United States' aging airports and air traffic control system."This is an emergency," Duffy said. "What's more important than having an air traffic control system tha...