Foreign countries are fun to explore. Right from food to different scenic sites, it is nothing but a sight for sore eyes. However, the thought of long-haul flights exhausts the very spirit of little traveller spirit inside us. However, this feeling has been taken care of. Now if you are in London, you can reach New York in just three and a half hours. This is possible because of Boom Supersonic, a US-based company which is developing the world’s fastest airline - Overture.