As survivors of the Japanese earthquake and tsunami grappled with the enormity of the devastation, more footage emerged on Sunday showing the moment the tsunami struck Japan's northeast coast. Residents of the port town of Kamaishi in Iwate prefecture watched in horror as the first huge tsunami waves hit, sweeping away cars and buildings. One group managed to scramble to safety on higher ground, where they watched as the water surged towards them. Others were stranded on the roof of a multi-storey building as the water level rose rapidly below