Fidel Castro lashes out at Obama on his 90th birthday as he is treated to a televised gala in Cuba
- Former Cuba president Castro's 90th birthday was Saturday
- The country celebrated in a low key way with a televised gala but no public parades or rallies
- Castro didn't speak during the gala but published a letter in state media in which he criticized Obama and said Cuba doesn't need 'the empire'
- He also told Obama to brush up on history and said his speech at Hiroshima in May was 'lacking stature'
- The US's increased tourism to the newly-opened country is the only bright spot in its economic forecast
PUBLISHED: 05:06, 14 August 2016 | UPDATED: 11:48, 14 August 2016