Mains Test Series GS 2 Asian games Great Games, Central Asia Trump-Kim meet ends with promise US-North Korea, Trump-Kim meet Historic handshake US-North Korea, Trump-Kim meet Russian games in Syria West asia, Syrian crisis GS 3 RBI blames PNB board for fraud Power of RBI, PNB case ISRO offers battery technology to firms Lithium battery, ISRO A plastic charter Plastic pollution, Environment Low recoveries of NPAs: RBI data NPA crisis, Age well: attitudes matter in a greying world Global attitude towards elderly When Artificial Intelligence goes psycho Potential dangers of biased data in machine learning