Very simplistic and naive assertion! They can talk about AAD and PAD, Prahar and Pragati, K15 and Shaurya, HUMSA NG and PANCHENDRIYA, SAMYUKTA and Ajanta, CMDS and next gen RWR all of which were developed successfully in secrecy. And they will !! Heck, even HAL can boast about ALH, Rudra...