article_snippet: Guantanamo Bay prison had 242 detainees when Obama  began his presidency, but Obama  population has been reduced to 122 .
article_snippet: Guantanamo Bay prison had 242 detainees when Obama  began his presidency.
article_snippet: Obama 's been able to cut its population down to 122 detainees, but Congress has blocked closure.
article_snippet: Lawmakers have banned the Obama  administration from bringing detainees to the United States for imprisonment or trial.
highlights_snippet: the prison had 242 detainees at the time but population is down to 122 .
  
highlights_snippet: Congress has blocked closure of detention center for terrorism suspects .