The Trump administration is considering banning U.S. citizens from traveling to North Korea after the death of Otto Warmbier. Last week, his father lashed out at tour companies that arrange trips to the isolated country, reports CBS News correspondent Ben Tracy. "The North Koreans lure Americans to travel to North Korea via tour groups run out of China who advertise slick ads on the internet," Fred Warmbier said. Democratic Congressman Adam Schiff introduced a bill to prohibit all American tourist travel to North Korea and has called the country a "despotic regime." "Americans go there, they're often taken hostage, essentially, and the North uses them as bargaining chips," Schiff said.