a large scale cyber attack that started in ukraine is continuing its spread across the globe. the virus freezes computers and demands that a ransom is paid. a danish shipping group, a russian oil giant, an american pharmaceutical company and a british advertising firm are among the big companies that have been hit. this might all sound familiar, because a similar attack targeted the uk s national health service last month. our security correspondent, gordon corera, has been monitoring the developments. a cyber attack is sweeping across the globe, taking systems off line. another reminder of the risks we face in our connected world. the first signs came in ukraine. systems went down this morning. some people tried to take money out of bank machines, found they couldn t. even the radiation monitoring system at the chernobyl nuclear plant was briefly taken offline. the scale was enormous. we had the virus spread, cyber virus on the transport, bank, media, infrastructure of ukrai
the virus freezes computers and demands that a ransom is paid. a danish shipping group, a russian oil giant, an american pharmaceutical company, and a british advertising firm are just among some of the big companies that have been hit. this might all sound familiar, because a similar attack targeted the uk s national health service, just last month. our security correspondent, gordon corera, has been monitoring all of the developments. a cyber attack is sweeping across the globe, taking systems off line. another reminder of the risks we face in our connected world. the first signs came in ukraine. systems went down this morning. some people tried to take money out of bank machines, found they couldn t. even the radiation monitoring system at the chernobyl nuclear plant was briefly taken offline. the scale was enormous. we had the virus spread, cyber virus on the transport, bank, media, infrastructure of ukraine, in government and in the co operative sectors as well. but duri
a danish shipping group, a russian oil giant, an american pharmaceutical company and a british advertising firm are among the big companies that have been hit. this might all sound familiar, because a similar attack targeted the uk s national health service, last month. our security correspondent, gordon corera, has been monitoring the developments. a cyber attack is sweeping across the globe, taking systems off line. another reminder of the risks we face in our connected world. the first signs came in ukraine. systems went down this morning. some people tried to take money out of bank machines, found they couldn t. even the radiation monitoring system at the chernobyl nuclear plant was briefly taken offline. the scale was enormous. we had the virus spread, cyber virus on the transport, bank, media, infrastructure of ukraine, in government and in the co operative sectors as well. but during the day, it became clear that the problem was not contained in ukraine but was spreadi