Asserting that the sacrifice of the 40 CRPF soldiers killed in a terror attack in Jammu and Kashmir's Pulwama will not go in vain, Prime Minister Narendra Modi said today security forces have been given a free hand to punish the perpetrators of the attack. At a public function in Pandharkawada in Maharashtra's Yavatmal district, where he launched a number of projects, PM Modi also slammed Pakistan for saying it has become a synonym for terrorism.