BRUSSELS  - The European Union's home affairs commissioner urged US President Barack Obama on Wednesday to fulfill his promise to close Guantanamo, calling the continued detention of prisoners "a disgrace". Marking 10 years since the US naval base in Cuba received its first terror suspects, Cecilia Malstroem wrote on Twitter that it was "A disgrace that prisoners are still held w/o trial." She added in her first ever message on Twitter: "President Obama, time to live up to your promise." The White House insisted Monday that Obama was determined to close Guantanamo, which accepted its first prisoners on January 11, 2002, four months after Al-Qaeda flew hijacked planes into the World Trade Center and Pentagon.