Displayed prominently in the apartment were pictures of el-Amir's son, Mohamed Atta, the man who is believed to have piloted American Airlines Flight 11 into the north tower of the World Trade Center as part of the attacks on the United States.
El-Amir said the attacks in the United States and the July 7 attacks in London were the beginning of what would be a 50-year religious war, in which there would be many more fighters like his son.
He declared that terror cells around the world were a "nuclear bomb that has now been activated and is ticking."
The man, who gave his age as "at least 70," said he had no sorrow for what happened in London, and said there was a double standard in the way the world viewed the victims in London and victims in the Islamic world.
Cursing in Arabic, el-Amir also denounced Arab leaders and Muslims who condemned the London attacks as being traitors and non-Muslims.
He passionately vowed that he would do anything within his power to encourage more attacks.
When asked if he would allow a CNN crew to videotape another interview with him, el-Amir said he would give his permission -- for a price of $5,000.
That money, he said, would not be kept for himself, but would be donated to someone to carry out another terror attack.
El-Amir said that $5,000 was about how much it would cost to finance another attack in London.
CNN's crew refused to pay for the interview and left after el-Amir's request.
It is CNN policy not to pay people for interviews.
A lawyer by trade, el-Amir had a sign on his apartment door saying he was a consultant.
The security guard for the apartment building said el-Amir had been under surveillance by Egyptian agents for several months after the September 11 attacks, but no one had been watching him recently.
