Taken two minutes after zero hour, at a height of around 12,000 ft and distance of 50 miles from the detonation site. Romeo’s mushroom cloud growing to an altitude of 40,000 ft (12 km). Ten minutes later, as it approached its crescendo, the cloud column had pushed upward around 25 miles (40 km), deep into the stratosphere, while its ballooning head went up to 10 miles (16 km), and spread for 100 (160 km).
