A soldier stands atop an army tank during rehearsals for the upcoming Republic Day parade in New Delhi. | EPS (Shekhar Yadav)Soldiers stand atop army tanks during rehearsals for the upcoming Republic Day parade in New Delhi. | EPS (Shekhar Yadav)Advanced Towed Artillery Gun system (ATAGS) developed by DRDO | EPS (Shekhar Yadav)CISF soldiers prepare to march during rehearsals for the upcoming Republic Day parade near the Presidential Palace in New Delhi. | EPS (Shekhar Yadav)CISF soldiers prepare to march during rehearsals for the upcoming Republic Day parade near the Presidential Palace in New Delhi. | EPS (Shekhar Yadav)DRDO during rehearsals for the upcoming Republic Day parade in New Delhi tuesday. | EPS (Shekhar Yadav)Indian Air force soldiers march during rehearsals for the upcoming Republic Day parade near the Presidential Palace in New Delhi. | EPS (Shekhar Yadav)Advanced Towed Artillery Gun system (ATAGS) developed by DRDO | EPS (Shekhar Yadav)