[Q]: A multi-colored train on a track.
A mostly black train on a track.

[A]: 3

[Q]: Death toll in Nigeria police attack rises to 30
Death toll in Kenya bus attack rises to six

[A]: 1

[Q]: Under the program, U.S. officials work with foreign port authorities to identify, target and search high-risk cargo.
Under the program, US officials work with foreign port authorities to seek out high-risk cargo before it can reach the United States.

[A]:
4