Nepal's army says it has finished draining a dangerous glacial lake near Mount Everest to a safe level. The Imja glacial lake, at nearly 5,000m (16,400ft) high, was in danger of flooding downstream settlements, trekking trails and bridges. The lake, which was originally 149m deep in places, has had its water levels lowered by 3.4m after months of pain-staking work, officials say. Imja is one of thousands of glacial lakes in the Himalayas.