This is the change everyone has been waiting for at London's Heathrow Airport

London's Heathrow Airport is one of the busiest hubs in the world and serves as a major point to connect traffic from Asia and Africa to North America.

As Britain's main international airport, Heathrow has been working hard to upgrade its facilities. In recent years, the airport has opened two new terminal buildings and has conducted significant renovations to others.

The greatest constraint on the airport, however, has been its lack of runways. Though more than 72 million passengers pass through Heathrow every year, the facility still operates using just two runways.

That's right, two. This makes operations for the airport quite challenging.

But if Heathrow's latest expansion plans are approved, things are about to change for the airport.