2. SOUNDBITE (English) Willie Lee, Chief Pilot South Florida Crop Care
"Very persistent about knowing how many the airplane would haul, how fast it will go."
3. Medium shot pilot descending from crop-duster
4. SOUNDBITE (English) Willie Lee, Chief Pilot South Florida Crop Care
"He kept trying to get in the airplane. There was nobody there but the ground crew. Everybody had gone. He said that he just had to run him away from the airplane because he kept trying to get up on the wing, wanting to get in the cockpit and so forth."
5. Wide shot of crop-duster on the ground pan to show pesticide storage area
6. Wide shot of crop-duster at work
7. SOUNDBITE (English) Ward Carroll, Author and U.S. Naval Commander:
"Things like anthrax spores are easily transported, easily put into a solution that could be dispensed out of a crop duster."
It has emerged that suspected hijacker Mohammed Atta visited a crop dusting airfield days before the World Trade Centre attack, increasing fears that aerial sprayers could have been part of a plan to launch a chemical assault.
As recently as the Saturday before the attacks, Atta was at a crop-dusting air field in Florida, asking what capacity of chemicals the planes could hold.
Chief pilot Willie Lee and others at the air field identified Atta for the F-B-I.
Lee claims Atta and a dozen other men came to the field repeatedly and that his ground crew chief had to order them away from the planes.
One of the men now under arrest as a material witness was found with a crop-dusting manual in his belongings.
Federal authorities fear the presence of Atta at the Florida airfield is yet another indication that the terrorists may have planned or still plan to use crop dusters to launch some kind of chemical or biological attack.
Previously unguarded, police are now stationed at this field 24 hours a day and crop dusters around the country's 30 biggest cities have been grounded since September 11.
The F-B-I continues to search for as many as 30 suspects said to be at large and flight trained.