The Argentine naval submarine went missing on Wednesday with 44 crew on board
Eight candidates are standing, with ex-president Sebastián Piñera seen as a clear favourite.
Mayor Antonio Ledezma, who had been under house arrest since 2015, escapes to Spain.
Brazil's culture wars heat up
Chile presidential's election explained
The Latin American artists grappling with a dark past
Venezuela grapples with its debt
How events in 1917 Russia still shape lives around the world
The huge task facing the island after Hurricane Maria
Broadcast time 07:06 GMT - 08:00 GMT
Broadcast time 08:06 GMT - 08:30 GMT
Broadcast time 11:06 GMT - 11:30 GMT
Broadcast time 13:06 GMT - 14:00 GMT
Should you give 'clean sleeping' a go?
Sign up for our newsletter