今天美政府将宣布对古巴外交政策的重大改变。

US to start talks with Cuba to normalize full diplomatic relations: AP

美将与古巴外交正常化谈判

Washington (CNN) -- U.S. contractor Alan Gross, held by the Cuban government since 2009, was freed Wednesday as part of a landmark deal with Cuba that paves the way for a major overhaul in U.S. policy toward the island, senior administration officials tell CNN.

President Barack Obama spoke with Cuban President Raul Castro Tuesday in a phone call that lasted about an hour and reflected the first communication at the presidential level with Cuba since the Cuban revolution, according to White House officials. Obama is expected to announce Gross' release and the new diplomatic stance at noon in Washington. At around the same time, Cuban president Raul Castro will speak in Havana

President Obama is also set to announce a major loosening of travel and economic restrictions on the country. And the two nations are set to re-open embassies, with preliminary discussions on that next step in normalizing diplomatic relations beginning in the coming weeks, a senior administration official tells CNN.

Talks between the U.S. and Cuba have been ongoing since June of 2013 and were facilitated by the Canadians and the Vatican in brokering the deal. Pope Francis -- the first pope from Latin America -- encouraged Obama in a letter and in their meeting this year to renew talks with Cuba on pursuing a closer relationship.

Gross' "humanitarian" release by Cuba was accompanied by a separate spy swap, the officials said. Cuba also freed a U.S. intelligence source who has been jailed in Cuba for more than 20 years, although authorities did not identify that person for security reasons. The U.S. released three Cuban intelligence agents convicted of espionage in 2001.

The developments constitute what officials called the most sweeping change in U.S. policy toward Cuba since 1961, when the embassy closed and the embargo was imposed.

Officials described the planned actions as the most forceful changes the president could make without legislation passing through Congress.