Chicago, IL - ASCO 2007 - Plenary Session here today, Monday June 4, 2007 during the American Society of Clinical Oncologys (ASCO) 43rd Annual Meeting. The meeting attracts more than 25,000 oncologists, researchers, and cancer care professionals from more than 100 countries. Date: Monday June 4, 2007. Credit: Photo Courtesy © ASCO/Todd Buchanan 2007. ASCO Contact: Tiffany Reynolds/Communications Dept.; 703-519-1423. Technical Questions: firstname.lastname@example.org; 612-226-5154.