Thanks to corrupt railway employees, anybody can get into reserve three tier compartment by paying a small fee to railway officials travelling in the train. Terrorists can get in and out without leaving any trace..
Large number of infiltrators under protection og congress government which protects them even in Supreme court..
Spineless creatures or congressmen in the seat of power who do not want to learn lessons from history or successful operations conducted in India or abroad because it is likely to affect their vote bank politics