Sierra Leone's president has declared a national emergency over rampant drug abuse. Kush, a psychoactive blend of addictive substances, has been prevalent in the country for years. President Julius Maada Bio called the drug a death trap and said it posed an existential crisis. One of the drug's many ingredients is human bones - security has been tightened in cemeteries to stop addicts digging up skeletons from graves. With a bandage around his ankle, one recovering addict told the BBC the drug has a tight grip on him.