Here are some documents to help you with the course.
1. General Motivation:
Lecture at the Cambridge workshop on non-abelian fundamental groups in arithmetic geometry (2009)
Lecture at Bordeaux conference in honor of Martin Taylor’s 60th birthday (2012)
Lecture at British Mathematical Colloquium (2011)
2. James Milne’s lecture notes:
3. Langlands programme:
Langlands’s lecture at Helsinki ICM
Report on work of Bao Chau Ngo (with Sugwoo Shin)
4. Topology of number fields:
Mazur’s paper on etale cohomology of number fields