Caloocan, Philippines - It has been almost three years since Alan Celiz's sons, Almon and Dicklie, were killed in violence related to the Philippines's "war on drugs" but he still cannot talk about them. Even saying their names is painful. When he tries, his breath catches in his throat and he has to choke back tears. "I'm sorry," Celiz said. "Two of them. Months apart. Killed just like that. Like they were nothing." More: § 'Free to kill': Duterte to newly appointed senior police officer § UN approves resolution to probe Duterte's 'war on drugs' § Philippines' Duterte: 'Kill those useless bishops' President Rodrigo Duterte's violent crackdown on illegal drugs in the Southeast Asian country has stripped entire communities of their young men. According to conflicting figures released by authorities , between 5,552 and 6,600 people have been killed in the drug war since Duterte came t...