On 5 June 2017, Indian Space Research Organisation (ISRO ) successfully launched India’s heaviest rocket – Geosynchronous Satellite Launch Vehicle (GSLV) Mark III (in pic) – carrying the 3,136 kg communication satellite GSAT -19. The 43.43 m rocket that weighs 640 tonnes was capable of lifting payloads of up to 4,000 kg into the Geosynchronous Transfer Orbit. It was developed in 15 years.