NEW : US official to CNN : The situation is a ` ` screw - up '' Dallas mayor : The team came into contact with up to 20 people . However , it 's unclear what kind of screening someone flying from West Africa might receive when they land in the United States , Cohen said . He says symptoms ' did not warrant admission ' last week . US official on CNN : ` ` They dropped the ball ''
NEW : US official to CNN : The situation is a ` ` screw - up '' Dallas mayor : The team came into contact with up to 20 people . He says symptoms ' did not warrant admission ' last week . US official on CNN : ` ` They dropped the ball ''