are available for Cuba, created a new Cuba licensing policy to help ensure the safety of civil aviation and the safe operation of commercial passenger aircraft, and made the deemed export and deemed reexport license requirements for Cuba consistent with other sanctioned destinations. In February 2016, the U.S. Government allowed two American men from Alabama to build a factory that will assemble as many as 1,000 small tractors a year for sale to private farmers in Cuba. The $5 million to $10 million plant would be the first significant U.S. business investment on Cuban soil since 1959. The deal was not authorized by Cuban authorities later that year because one of the owners had recently obtained Cuban citizenship. Factory ownership is still illegal in Cuba. In concert with a prisoner exchange with Cuba, Presidents Barack Obama and Raúl Castro announced moves on December 17, 2014, to reestablish diplomatic relations and to loosen travel and economic policies. Cuba released Alan Gross, an American prisoner, on humanitarian grounds and exchanged an unnamed American spy for the three remaining members of the Cuban Five. Obama also announced a review of Cuba's status as a terrorist state and an intention to ask Congress to remove the embargo entirely. Cuba agreed to release 53 political prisoners and to allow Red Cross and UN human-rights investigators access. On May 29, 2015, according to the U.S. State Department, "Cuba's designation as a state sponsor of terrorism was rescinded". Under the announced changes by President Obama, there will be an increased ability to transact with Cuban nationals and businesses, including Cuban financial institutions. Additionally, permitted U.S. banks will now be able to open accredited accounts in Cuban banks. On January 12, 2017, President Barack Obama announced the immediate cessation of the wet feet, dry feet policy, eight days before his term ended. The Cuban government agreed to accept the return of Cuban nationals. Beginning in 2014, anticipation of the end of the policy had led to increased numbers of Cuban immigrants. On November 8, 2017, it was announced that President Donald Trump's Administration had enacted new rules which would re-enforce the business and travel restrictions which were loosened by the Obama Administration and would go into effect on November 9. In July 2021, under President Joe Biden, the United States imposed sanctions on Cuba's police force and on two of Cuba's leaders in response to the 2021 Cuban