Which development led to the other three?
(1) United States invasion of Afghanistan
(2) increased security at airports
(3) creation of the Department of Homeland
Security
(4) September 11, 2001 attacks on the United
States
Which development led to the other three?
(1) United States invasion of Afghanistan
(2) increased security at airports
(3) creation of the Department of Homeland
Security
(4) September 11, 2001 attacks on the United
States