First of all, please be clear that Secretary of State Clinton herself is not planning to sell any mangoes -- she was just talking about helping Pakistan get permission to export mangoes to the US.
If I were writing an article about this, I would concentrate on why Clinton wants Pakistani mangoes to be sold in the US (unless I were writing for an audience of people who are very interested in mangoes, in which case you might write about the kinds of mangoes that would be sold, how many, for how much, etc). I would want to write about why this would matter at all to the US Secretary of State.
The reason for Clinton's interest is that she wants to reduce anti-American feelings in Pakistan. So I would write about
- Why there are anti-American feelings in Pakistan
- Why/how the selling of mangoes is supposed to ease those feelings.
- Whether that plan has much of a chance.