President Obama landed in Cuba on Sunday afternoon, hours after dozens of dissidents from the Ladies in White movement were detained during a post-Mass, pro-democracy march, in what has become a weekly ritual of protest and arrest over almost a year. “Obama, traveling to Cuba isn’t fun,” read a banner carried by the demonstrators. “No to human rights violations.” Any hopes that this week’s demonstration, on the eve of Obama’s arrival, would be tolerated were quickly put to rest, as police handcuffed and bussed away dozens of the protesting women, and a handful of men. Ladies in White was established...