Lawyers for Kenya\'s President Uhuru Kenyatta on Friday asked for his crimes against humanity trial to be postponed, citing the crisis triggered by a deadly attack on a Nairobi shopping centre. \"The defence requests the chamber to vacate the 12 November 2013 date for the commencement of trial, and postpone the commencement of trial until at least 12 February 2014,\" his lawyers said in a document.