Mr. Howard, who worked for the CIA for 36 years as an operative, claims he was tapped by senior CIA agents to work on the project due to his engineering background, and early career in the demolition business.

Trained as a civil engineer, Mr. Howard became an explosives expert after being headhunted by the CIA in early 1980s. Mr. Howard says has extensive experience in planting explosives in items as small as cigarette lighters and as large as "80 floor buildings."

The 79-year-old New Jersey native says he worked on the CIA operation they dubbed "New Century" between May 1997 and September 2001, during a time he says the CIA "was still taking orders from the top." Mr. Howard says he was part of a cell of 4 operatives tasked with ensuring the demolition was successful.