By Ben Tavener, Senior Contributing Reporter
RIO DE JANEIRO, BRAZIL – The first stage of the operation to cement shut a leaking Chevron oil well 230 miles (370km) off the Rio de Janeiro coastline appears to have been successful, officials at the ANP - Brazil’s oil regulator - have said, with underwater images showing just a “residual flow” continuing to leak from the seabed.
Officials also said the slick was . . .