Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Obama Moved Aggressively to Restore Relations with Cuba by Isabela Cocoli WASHINGTON -- The United States restored diplomatic relations with Cuba July 20, 2015, but has maintained the commercial, economic and financial embargo against the Communist island. President Barack Obama, however, has moved aggressively to also restore economic relations with the country, implementing a number of changes as recently as October. The changes included the easing of restrictions on the island in an attempt to create more economic opportunities between the two countries. The administration approved a package of regulatory changes that was intended to expand scientific, humanitarian, trade and commercial opportunities between the U.S. and Cuba. President Obama said "very real differences" on democracy and human rights still exist between the two countries but the best way to address the differences is through engagement. The administration's plan was intended to promote joint medical research between the two countries, the sale of Cuban pharmaceuticals in the U.S. and banking opportunities for Americans in Cuba. Humanitarian-related initiatives involving scholarships for scientific research and improving Cuba's infrastructure would also be expanded. "These steps have the potential to accelerate constructive change and unlock greater economic opportunity for Cubans and Americans," Treasury Secretary Jacob Lew said in a statement. From Kennedy to Obama In March 2016, Obama became the first sitting U.S. president to visit Cuba since the Castro revolution, opening a new chapter in relations between Havana and Washington, but over the past half-century other American leaders had tried to do the same. In late 1962, after the Cuban missile crisis that brought the world to the brink of global nuclear conflict, then-President John F. Kennedy explored the idea of normalizing relations with Cuba by capitalizing on Castro's displeasure that Moscow withdrew its missiles from the island without consulting him. Kennedy asked an Algerian-French journalist, Jean Daniel, to convey a message to Castro in 1963, and Daniel later wrote that Castro and Kennedy "seemed ready to make peace." But the diplomatic project collapsed after Kennedy's assassination in Texas, November 22 of that year, and former Vice President Lyndon Johnson did not pursue the initiative when he took over the White House. In fact, suspicions abounded in some parts of the U.S. for years afterward that Cuba had had a role in orchestrating Kennedy's assassination. During Gerald Ford's presidency in the mid-1970s, then-Secretary of State Henry Kissinger explored the idea of rapprochement with Cuba, under conditions of the utmost secrecy. The intervention of Cuban forces in Angola's civil war in 1975 killed Kissinger's efforts. Breakthrough began in 2013 A few weeks after President Jimmy Carter took the presidential oath of office in 1977, he ordered a new round of talks in the hope of normalizing ties with Havana, but Cuba's military adventures in Africa in support of leftist causes and candidates doomed that initiative, too. Presidents Ronald Reagan, George H.W. Bush, Bill Clinton and George W. Bush maintained a foreign policy that ruled out any concessions toward Havana unless there was regime change in Communist Cuba. It was not until the spring of 2013, when Obama was in his second term, that he authorized the start of exploratory discussions with Havana. The first meeting took place in June that year in Canada, in full secrecy. FILE - Pope Francis gestures while addressing the crowd from the Cathedral of Our Lady of the Assumption in Santiago, Cuba, Sept. 22, 2015. Pope brokered U.S.-Cuba talks Pope Francis wrote to the U.S. and Cuban leaders -- Obama and Raul Castro, who had by then succeeded his brother, Fidel, as president -- urging them to normalize relations. In October 2013, U.S. and Cuban delegations met in the Vatican, together with officials from the Holy See, to finalize the terms of re-establishing diplomatic ties. That development managed to stay out of the public eye until December 17, 2014, when Obama and Castro announced that Washington and Havana would resume diplomatic ties.