London's Heathrow airport suspended all departures on Tuesday due to reported drone sightings.<br />It came just weeks after a similar debacle left thousands of travelers stranded at Gatwick airport.<br />Departures from Britain's busiest airport were grounded for about an hour before being given the all clear.<br />Inbound flights were not affected.<br />Heathrow officials apologized for the delays, adding they are working with local police to investigate the incident. <br />
