To get the modern warfare 3 scout leader achievement or trophy you will need to collect all 46 intel items during the entire playthrough of the game. You can find all the intels in the video guides below which will take you step by step to collect all of them. In all the chapters you will be able to find the enemy intels, there are some that are easy to gather and some are tough but we have made videos for all the locations in the game.
TOC:
Modern Warfare 3 Walkthrough
Modern Warfare 3 Review
Modern Warfare 3 Village Survival Mode Walkthrough
Modern Warfare 3 Enemy Intel Locations
Modern Warfare 3 Wiki
Modern Warfare 3 Achievements
Modern Warfare 3 Trophies
Black Tuesday
Hunter Killer
Persona Non Grata
Turbulence
Back on the Grid
Mind the Gap
Goalpost
Return to Sender
Bag & Drag
Iron Lady
Eye of the Storm
Blood Brothers
Stronghold
Scorched Earth
Down the Rabbit Hole
Dust to Dust