Question

What was the immediate effect of the September 11th attacks on US airlines?
O
O
O
O
They went out of business because people stopped flying.
They were only allowed to fly outside the United States.
They continued to fly normally with armed guards on board.
They were grounded and unable to operate for several days.

Answer 1

Answer:

D

Explanation:

for the simple fact of security reasons

Answer 2

The immediate effect of the September 11th attacks on US airlines make them grounded. and unable to operate for several days.

What is an attack?

The attack was the demolition that was caused to the US airline by the attacker in September which makes them to stop operation.

This attack make some people to loose their lives and called the attention of US government.

Learn more about attack at;

https://brainly.com/question/14366812