US Secretary of State Colin Powell acknowledged Friday that pre-war information he gave the United Nations on Iraq's mobile chemical and biological weapons laboratories to justify the US-led war on Iraq was not "solid". Before the US-led war on Iraq, Powell had presented the UN with data proclaiming to prove that Iraq was engaged in the development of weapons of mass destruction. "Now it appears not to be the case, that it was that solid," Powell told reporters on the plane taking him back to Washington from a trip to Brussels. "But at the time I was preparing that presentation it was presented to me as being solid," he said.