Now Playing: Who is Raul Castro?
Now Playing: Dog rescued from frozen river in daring mission
Now Playing: Australia’s ‘oldest naval mystery’ finally solved
Now Playing: Terrifying attack on holiday shoppers in Melbourne called ‘a deliberate act’
Now Playing: $2.7 billion Christmas lottery in Spain
Now Playing: 2 arrested in ‘deliberate’ car ramming in Australia
Now Playing: ‘Deliberate’ car ramming injures 19 in Australia
Now Playing: Funeral for disgraced Cardinal Bernard Law slated for Thursday in Rome
Now Playing: Car slams into pedestrians in Melbourne
Now Playing: Confusion in aftermath of Melbourne car-ramming incident
Now Playing: 8 American tourists killed in Mexico bus crash
Now Playing: Putin regime allegedly funds ultranationalist biker gang
Now Playing: Catalonia elections explained
Now Playing: Lottery winners get glimpse of Japan’s new baby panda
Now Playing: Ecuador volcano sends lava and ash into the sky
Now Playing: Inside a training session with a pro-Putin paramilitary group
Now Playing: Rome’s Christmas tree leaves no one green with envy
Now Playing: Asking Russians what ‘America,’ ‘Trump,’ mean to them
Now Playing: 12 killed in Mexico tour bus crash
Now Playing: Tourist bus crashes in rural Mexico
