Events (4)

• October 2, 2001-Mid-December, 2001: Specialists Take Air Samples One Mile North of Ground Zero 2001-10-02
• February 11, 2002: Study Raises Concerns over Environment near Ground Zero 2002-02-11
• September 11, 2003: Study Finds WTC Fire Gases Gave Off Harmful Particles 2003-09-11
• Early November 2001: Ground Zero Samples Sent for Analysis