AP "Trump administration issues new visa rules for travelers from six Muslim nations"
A better reporter might have written
"Trump administration issues new visa rules for travelers from countries on the State Department's list of State Sponsor's of Terrorism List"
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If the reporter had taken the trouble to understand what he was talking about, some useful background information might have included the following.
The SD's Terrorism List was originally formed in 1979.
Since then there have been a total of 8 countries on the list.  In addition to the six listed in the Trump ban, it has included Cuba and North Korea.
Over the years countries have been added, removed and then put back again.
Syria, Iran and the Sudan have been continuously on the list for a number of years.
Iraq has been on and off.  Cuba was removed by the Obama administration.  North Korea was removed by the Bush administration but is being put back.
The six banned countries were the ones that are currently on the list.