The PD-50 dock sank after a power cut led to rapid flooding of its ballast tanks. Both its cranes collapsed, one hitting the aircraft carrier which was exiting the dock at the time. Tass/Getty ...

Two giant cranes weighing more than 2,000 tonnes have been welcomed to a port on the River Thames in a rare event for the UK. The mammoth quay cranes, the largest in Europe, were offloaded on ...