The gobi dessert covers parts of northern and northeastern china and of southern Mongolia
I think it is the political divide between Western and Eastern Europe. Here's a picture.
Answer:
B. Skyscraper
Explanation:
I think this is correct, but sorry if I'm wrong.
Passengers became aware of the terrorists’ plans
On the back of the plane, the passengers and crew of Flight 93 made a series of calls to their cell phones and to the Airfones during the flight, informing family members and officials on the ground about the hijacking of the plane.