When the Peruvian submarine Pacocha crashed and plunged 42 metres down to the seabed with 22 sailors inside, it was First Lieutenant Roger Cotrina Alvarado's job to save his crew. Show more
Discover 11,128,835 listings and 280,389 playable programmes from the BBC
When the Peruvian submarine Pacocha crashed and plunged 42 metres down to the seabed with 22 sailors inside, it was First Lieutenant Roger Cotrina Alvarado's job to save his crew. Show more
The BBC's international radio station
