Pic from space shows world's biggest iceberg moving after 30 years

A satellite imagery of the world's biggest iceberg which is on the move after more than 30 years has been released. Named A23a, the 4,000 sq km iceberg in Antarctica split from the coastline in 1986 and remained stuck to the ocean floor. It is now drifting past the northern tip of Antarctic Peninsula, driven by strong winds and currents.