Updated: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. They deny all charges against them. At least 67 people were killed after gunmen took hold of the complex in September 2013. Their defense attorney says the men had never been there before. A Somali Islamist rebel group claimed responsibility for the attack, in which Kenyan authorities say, all gunmen were killed.