One thing I would add to whats been said already.
Your cover letter could be a good place to justify or persuade the recruiter about a certain topic. For example, if applying to the UAE offices, recrutiers typically want to see that you have a good reason to be there - this could be spoken laugauge, family, previously lived there and want to settle there, experience with public sector work (since that's the focus with projects). etc...
That being said, it is not gauranteed that the recruiters will read that.