Trump signs order banning citizens of 12 countries from entering US | First Thing

Nationals from countries including Afghanistan, Haiti and Sudan fully' restricted. Plus, a breakthrough in HIV research

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Good morning.

Donald Trump has signed a sweeping order banning travel to the US from 12 countries and restricting travel from seven others, reviving and expanding the travel bans from his first term.

What are the details of the ban? The nationals of Afghanistan, Myanmar, Chad, the Republic of the Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan and Yemen will be fully" restricted from entering the US, according to the proclamation. Meanwhile, the entry of nationals of Burundi, Cuba, Laos, Sierra Leone, Togo, Turkmenistan and Venezuela will be partially restricted.

What do critics say? Advocates and experts have said blanket travel bans discriminate against groups of people based on ethnicity alone. They will likely result - like during Trump's first term - in family separations.