The US President Barrack Obama says bringing peace and security to Afghanistan and Pakistan remained the singular focus of his administration. <br/><br/>In an interview, to a TV channel, he said dismantling and destroying militants bases in both the countries is the main focus of the US administration and the primary objective of its Afghan strategy. <br/><br/>President Obama described the Afghan President Hamid Karzai as a critical partner in America's war against al-Qaeda. <br/><br/>Obama said he is convinced Mr. Karzai is committed to achieve a strong, stable and prosperous Afghanistan. <br/>