Following a terror attack in London that killed at least seven people Saturday night, President Donald Trump pushed for his travel ban to be reinstated.
The president's order would temporarily keep people from six Muslim-majority countries from coming to the U.S.
But we don't know if a similar travel ban would have prevented the recent attack in Great Britain. As of Sunday morning, police hadn't released the nationalities of the three London Bridge and Borough Market attackers.
Trump's revised travel ban has been blocked since March. The administration asked the Supreme Court to hear the case, but the justices haven't decided yet.