At 9:59 AM, what caused the "mushroom cloud" of "billowing smoke"
as seen and described by the news
reporter?

The terrorist attack on the Twin Towers

Explanation:

This question refers to the reaction that Aaron Brown, a news anchor, had upon witnessing the attack on the Twin Towers on September 11, 2001. Brown was a witness that day, as he had been standing on a roof in New York City about 30 blocks from the World Trade Center. Brown described "a huge explosion" and a "mushroom cloud" of "billowing smoke." However, Brown also reported that he did not think the towers were going to collapse.

american troops were forced to withdraw following deadly bombings.

explanation: