Four men suspected of helping al Qaeda-linked militants launch a deadly attack on high-end Nairobi shopping mall in are taken to the site where the carnage took place Tuesday.<br/> <br />They deny all charges against them.<br/> <br />At least 67 people were killed after gunmen took hold of the complex in September 2013.<br/> <br />Their defense attorney says the men had never been there before.<br/> <br />A Somali Islamist rebel group claimed responsibility for the attack, in which Kenyan authorities say, all gunmen were killed.
