Explanation:

• The United States recently designated Cuba as a state sponsor of terrorism.
• The United States lists the countries that repeatedly provide support for acts of international terrorism under the State Sponsors of Terrorism.
• The list was first released in 1979 with Iraq, Libya, Syria and South Yemen in it.
• Cuba was added in 1992, Iran in 1984. Later North Korea and Sudan were added in 1988 and 1993 respectively. Later South Yemen was removed in 1990.
• Iraq has been removed twice from the list, once in 1982 and then again in 2004. Libya was removed in 2006. North Korea was removed in 2008 and again re-added in 2017.
• Cuba was removed in 2015 and has now been re-added.