CAROL COSTELLO, CNN ANCHOR: It is still a mystery this morning exactly what does a 55-gallon drum contain. It was found in northern Iraq, and officials think it may contain or had contained a mixture of nerve and blister agents. We take you live to northern Iraq and Nic Robertson. Bring us up-to-date -- Nic.</s>NIC ROBERTSON, CNN SENIOR INTERNATIONAL CORRESPONDENT: Carol, that's still the question at this time. There are three different teams that have been to this site and made tests. The 1st Squadron of the 10th Calvary made the first test. They concluded in that 55-gallon drum that there was a blister agent and cyclosarin, a nerve agent. A second team came here, a so-called "sensitive site team." They concluded the same positive results for the blister agent and for the nerve agent. A third team came, a mobile exploitation team, the most senior team and the most recent team to visit this site. They performed tests on this</s>COSTELLO: OK, we seem to be having a problem. But let me bring you up-to-date. Two tests turned out to be positive. One test, the most recent test, turned out to be negative. Nic had reported earlier that some of the testing equipment may not be exactly right to determine exactly what is in that drum or what's in the other drums as well. We're going to take you back to northern Iraq and Nic Robertson when we get his signal back up. TO ORDER A VIDEO OF THIS TRANSCRIPT, PLEASE CALL 800-CNN-NEWS OR USE OUR SECURE ONLINE ORDER FORM LOCATED AT www.fdch.com. Iraq>
U.S. Team Tests for Possible Chemical Agents in Northern Iraq