There were some supposedly unrelated technological glitches yesterday that had major impact in the USA:

July 9, 2015

Three outages came one after another on Wednesday morning, affecting one of America’s biggest airlines, its largest financial news publication and its main stock exchange. The spate of technological foul-ups grounded United Airlines flights, sidelined the Wall Street Journal’s website and halted trading for more than three hours on the New York Stock Exchange. ... continue reading