Indeed, mostly for junior positions, ATKearney have recently one of the case study of first round interviews, by a synthesis exercises.
The meeting will still last 1h, and prior to syntehis exercice you will have a fit interview.
Now about the synthesis exercise, this is to test your ability to quickly conduct some research and summurise it in a structured way.
The topic in itself is not so important, and you should not worry too much about your general background to cover it. You will have 15 mins to conduct researches (ipad available in the room), and prepare for your presentation. The key sucess factor is that you take time within this 15 min to really stucture your presentation, and avoid building it on the fly.
Somehow the topic should be connected to the news. For example this could be "Olympics in Paris 2024 : for and cons." They you should look for the different arguments existing and structure it while you will deliver the argumentation. ex. 1. Economical impact, 2. Political, 3.etc.
Overall your presentation may end up as a discussion with your interviewer but make sure you always remain structured in the way you present your arguments.