Barack Obama in Cuba at start of historic visit

He is the first sitting US president to visit since the 1959 revolution, which heralded decades of hostility.
Speaking at the reopened US embassy in Havana, he called the visit "historic". He also spent time in the old city.
Mr Obama will meet President Raul Castro, but not retired revolutionary leader Fidel Castro, and the pair will discuss trade and political reform.
The US president emerged smiling from Air Force One with First Lady Michelle and their daughters Sasha and Malia.
Holding umbrellas, the party walked in light drizzle along a red carpet to be greeted by Cuban Foreign Minister Bruno Rodriguez.
Two hours after landing, Mr Obama greeted staff from the US embassy with the words: "It is wonderful to be here".
"Back in 1928, President [Calvin] Coolidge came on a battleship. It took him three days to get here, it only took me three hours. For the first time ever, Air Force One has landed in Cuba and this is our very first stop."
He added the trip was a chance to for him to lay out a "vision for a future that is brighter than our past".
The Obamas later began a walkabout in historic Old Havana.
The tour was meant to see them interacting with ordinary Cubans on the streets, but this part of the itinerary was marred by a tropical storm.
They huddled under umbrellas before visiting the national cathedral.

President Obama's visit is the highpoint of a recent easing of ties, which included the opening of embassies last year.
But only hours before his arrival, protesters calling for the release of political prisoners were arrested in the capital, Havana.
Police took away dozens of demonstrators from the Ladies in White group, formed of political prisoners' wives, from outside a church where they attempt to hold weekly protests.

Before President Obama arrived, US and Cuban officials got into tense discussions on the tarmac over security questions - and how close Cuban photographers could get to Mr Obama after he arrived.
Speaking through an interpreter, the Americans tried to set strict boundaries for the photographers - a sign that even under the most friendly circumstances, officials from the two countries run into conflicts.
As Mr Obama spoke to US and Cuban officials, a photographer took pictures. A few minutes later, another US official rushed towards Mr Obama and his family members and gestured for the photographer to step back.
Afterwards the presidential motorcade left the airport, and two of the vehicles were decorated with US and Cuban flags.
People stood on the side of the road near the airport as the motorcade passed by - some of the Cubans at the side of the road waved at the Americans in the cars.
Correspondents say the visit - the first by a sitting US president for 88 years - marks a huge turnaround in US-Cuban relations.
It is hard to overstate the significance of this trip because as recently as 18 months ago, the idea of a US president setting foot on Cuban soil would have been unthinkable, the BBC's North America editor Jon Sopel says.
It represents the opening of a new chapter in the affairs of the two nations, our correspondent says.
Mr Obama and Raul Castro will sit together at a state dinner, there will be a joint news conference and they will discuss trade.
The White House has made it clear President Obama will meet political dissidents, whether the Cuban authorities like it or not. That is expected to include members of the Ladies in White group.Before President Obama arrived, US and Cuban officials got into tense discussions on the tarmac over security questions - and how close Cuban photographers could get to Mr Obama after he arrived.
Speaking through an interpreter, the Americans tried to set strict boundaries for the photographers - a sign that even under the most friendly circumstances, officials from the two countries run into conflicts.
As Mr Obama spoke to US and Cuban officials, a photographer took pictures. A few minutes later, another US official rushed towards Mr Obama and his family members and gestured for the photographer to step back.
Afterwards the presidential motorcade left the airport, and two of the vehicles were decorated with US and Cuban flags.
People stood on the side of the road near the airport as the motorcade passed by - some of the Cubans at the side of the road waved at the Americans in the cars.
Correspondents say the visit - the first by a sitting US president for 88 years - marks a huge turnaround in US-Cuban relations.
It is hard to overstate the significance of this trip because as recently as 18 months ago, the idea of a US president setting foot on Cuban soil would have been unthinkable, the BBC's North America editor Jon Sopel says.