India today said, Pakistan, which had denied knowledge of Osama bin Laden's whereabouts, had a lot to explain in the aftermath of the killing of the dreaded terrorist on its soil. External Affairs Minister S M Krishna told reporters in Kuala Lumpur, that said, he thought that Pakistan has a lot to explain on that score. He said this while responding to questions by the media on the constant Pakistani claims that it was not aware of the whereabouts of Al-Qaeda chief bin Laden, who was killed by special US forces yesterday in Abbottabad, near Islamabad.Krishna, had yesterday, termed Bin Laden's killing as the victorious milestone in the global war against terrorism. He said the world must not let down its united effort to eliminate the safe havens that have been provided to terrorists in its neighbourhood.External Affairs Minister S M Krishna, who is on a three-day official visit to Malaysia, today signed the 5th joint commission agreement with his Malaysian counterpart Anifah Aman in Kuala Lumpur.