CNN  —  Former Costa Rican President and Nobel Peace Prize laureate Óscar Arias says he has had his visa to enter the United States revoked. Arias, 84, said he doesn’t know why his visa was canceled but accepts that the US has the right to make such a decision. Miguel Guillén, the secretary general of Arias’ National Liberation Party, said the former president had received an email notifying him of the move. “I don’t know if the revoking of my visa is the product of some sort of retaliation,