India today successfully test-fired the most advanced long-range missile system Agni-4 today. The missile was launched from a Road Mobile System at 9.00 AM from Wheelers’ Island off the coast of Odisha. The missile followed its trajectory, in a text book fashion, attained a height of about 900 kms and reached the pre-designated target in the international waters of Bay of Bengal. All mission objectives were fully met. All the systems functioned perfectly till the end encountering the re-entry temperatures of more than 3000⁰C. This missile is [one-of-a-kind], proving many new technologies for the first time, and represents a quantum leap in terms of missile technology. The missile is lighter in weight and has two stages of solid propulsion and a payload with re-entry heat shield. The composite rocket motor which has been used for the first time has given excellent performance. The missile system is equipped with modern and compact avionics with redundancy to provide high level of reliability. The indigenous Ring Laser Gyros based high accuracy INS (RINS) and Micro Navigation System (MINGS) complementing each other in redundant mode have been successfully flown in guidance mode for the first time. The high performance onboard computer with distributed Avionics architecture, high speed reliable communication bus and a full Digital Control System have controlled and guided the missile to the target. The missile reached the target with very high level of accuracy. Radars and electro-optical systems along the coast of Odisha have tracked and monitored all the parameters of the missile. Two Indian naval ships located near the target witnessed the final event.