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			 A photograph showed Obama and Castro, both wearing dark suits, 
			chatting in a small group of leaders at the summit's opening 
			ceremony. A White House official confirmed the two men shook hands 
			and spoke briefly. 
			 
			"This was an informal interaction and there was not a substantive 
			conversation between the two leaders," the official said. 
			 
			Obama and Castro are expected to meet again on Saturday and talk 
			about their efforts to restore full diplomatic relations and boost 
			trade and travel between the two countries. 
			 
			Their rapprochement, first unveiled in a historic policy shift in 
			December, is the central issue at the Summit of the Americas meeting 
			in Panama. 
			 
			"As we move towards the process of normalization, we'll have our 
			differences government to government with Cuba on many issues. Just 
			as we differ at times with other nations within the Americas, just 
			as we differ with our closest allies," Obama said earlier on Friday. 
			 
			But the 53-year-old Obama, who was not even born when Fidel and Raul 
			Castro swept to power in Cuba's 1959 revolution, also said the 
			United States is no longer interested in trying to impose its will 
			on Latin America. 
			
			  "The days in which our agenda in this hemisphere so often presumed 
			that the United States could meddle with impunity, those days are 
			past," he said. 
			 
			Apart from a couple of brief, informal encounters, the leaders of 
			the United States and Cuba have not had any significant meetings 
			since the Castro brothers toppled U.S.-backed dictator Fulgencio 
			Batista and then steered their Caribbean country into a close 
			alliance with the Soviet Union. 
			 
			Colombian President Juan Manuel Santos hailed Obama's push to 
			improve relations with Cuba, saying it was helping to heal a 
			"blister" that was hurting the region. 
			 
			However, Cuban dissident Guillermo Farinas said civic groups in Cuba 
			have been sidelined from talks and appealed to Obama to support 
			their push for more democracy. 
			 
			"The Cuban government is showing no goodwill ... They don't want to 
			make any kind of concessions," he told Reuters. 
			 
			Obama, who met with activists from across Latin America, including 
			two Cuban dissidents, appears to be close to removing communist-run 
			Cuba from a U.S. list of countries that it says sponsor terrorism. 
			 
			Its inclusion on the list brings a series of automatic U.S. 
			sanctions and Cuba is insisting it be taken off as a condition of 
			restoring diplomatic ties. 
			 
			Washington imposed trade sanctions on Cuba from 1960 and broke off 
			diplomatic relations with Cuba in 1961, but the ensuing freeze did 
			it no favors, said Ben Rhodes, Obama's deputy national security 
			adviser. 
			 
			"Our Cuba policy, instead of isolating Cuba, was isolating the 
			United States in our own backyard," he noted. 
			 
			
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			COOPERATION 
			 
			The two countries have maintained contact through interests sections 
			in Havana and Washington since 1977, and in recent years they have 
			increasingly cooperated on issues such as migration and drug 
			trafficking. 
			 
			The State Department has now recommended that Cuba be taken off the 
			terrorism list, a U.S. Senate Foreign Relations Committee aide said. 
			Obama is expected to agree, although it is not clear whether he will 
			announce it during the summit. 
			 
			Obama has already used his executive authority to ease some trade 
			and travel restrictions, and is seeking to encourage nascent small 
			businesses in Cuba by allowing more exports there. 
			 
			But only Congress, controlled by Republicans, can remove the overall 
			U.S. economic embargo on the island. The rapprochement by Obama, a 
			Democrat, has met some resistance in Washington and among some 
			influential Cuban-Americans. 
			 
			Critics say Cuba should not be rewarded unless it changes its 
			one-party political system. 
			 
			While Obama's policy has been widely praised around Latin America, 
			this was tempered last month when his administration imposed 
			sanctions on Venezuela, Cuba's closest ally and main benefactor. 
			 
			That controversy now hangs over the summit this weekend. 
			 
			Venezuelan President Nicolas Maduro plans to present Obama with a 
			petition signed by millions of people demanding that the sanctions 
			be reversed. He is certain to receive support from Castro and other 
			left-wing leaders in Latin America. 
			 
			"It is no time for imperialism, threats, it is time for peace, 
			cooperation, union, progress, prosperity," Maduro said on arrival in 
			Panama. 
			
			  
			
			
			  
			
			 
			 
			(Additional reporting by Daniel Trotta, Anahi Rama, Jeff Mason, 
			Roberta Rampton; Editing by Kieran Murray, Simon Gardner and Frances 
			Kerry) 
			
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