Feb. 23 -- UC Davis Professor Thomas Cahill will be in Manhattan on Saturday, Feb. 23, to present the results of his analysis of the dust and smoke produced by the collapse of the World Trade Center. Cahill has been called to testify before an investigative hearing by the national ombudsman of the U.S. Environmental Protection Agency. The public hearing is hosted by U.S. Rep. Jerrold Nadler (D-New York). It begins at noon at the U.S. Courthouse, 500 Pearl St., Manhattan. A detailed Feb. 11 news release on the UC Davis findings is online at http://www.news.ucdavis.edu. More information about the Saturday hearing is online at http://www.house.gov/nadler/press/feb14EPA.htm. Photographs and b-roll are available. Media contact: Sylvia Wright, News Service, (530) 752-7704, swright@ucdavis.edu. On Saturday, Feb. 23: cell phone (530) 304-8100.