JAMMU, Feb. 16 -- Twenty-six-year-old Kulwinder Singh's father Darshan Singh says he is proud of his only son. Kulwinder is one of the four CRPF soldiers from Punjab, who were killed in the attack on Thursday afternoon. The resident of Rauli village near Nurpur Bedi in Rupnagar district had joined the 92nd battalion of CRPF in 2014. He returned to his battalion in Jammu and Kashmir on February 10 after a tenday leave....