to keep it strong. (elephant noise) >> anderson cooper: now an update on our story on "lumber liquidators," about how the leading hardwood retailer in the country sold chinese-made laminate flooring that did not meet u.s. health and safety standards and released potentially harmful levels of formaldehyde. after our story aired last march, the consumer product safety commission working with the centers for disease control launched a study of that laminate flooring. this month, the government published its findings.