Cuba has presented its most detailed defense to date against US accusations that American diplomats in Havana were subjected to mysterious sonic attacks that left them with a variety of ailments including headaches and hearing problems. (Oct. 27)

President Trump cracked down Wednesday on U.S. travel and business with Cuba, a major step toward rolling back another Obama-era policy.

Under new regulations that take effect Thursday, the Trump administration is banning U.S. citizens from doing business with dozens of entities that have links to Cuba’s military, intelligence and security agencies.

The list includes stores, hotels, tourist agencies and even two rum makers frequently visited by Americans who have flocked to the communist country in recent years.

The Obama administration ended more than 50 years of diplomatic isolation with its Cold War foe in December 2014. The historic move re-established embassies in Havana and Washington, made it easier for Americans to visit the long-isolated island and was punctuated by a personal visit to Havana where President Barack Obama met several times with Cuban President Raúl Castro.

Trump repeatedly questioned this easing of hostilities. He vowed to cut the opening throughout the presidential campaign and claimed in June that the U.S. gave away too much in exchange for too little.

The White House also blamed Cuba for a series of unexplained attacks against U.S. diplomats on the island, prompting the State Department to cut back its staff in Havana and halt the processing of visas for Cubans trying to reach the United States. 

On Wednesday, the Commerce, Treasury and State departments announced regulatory changes that will close many doors opened by Obama nearly three years ago. The administration says blocking Americans from…