U.S. and British military officials are investigating the death of British aid worker Linda Norgrove, who was being held by the Taliban in Afghanistan. Norgrove died last Friday after U.S. Special Forces stormed the compound where she was being held. The 36-year-old Scot was working in Afghanistan for the U.S.-based nonprofit group Development Alternatives Inc. She was an adventurer and a humanitarian. And according to her friend and colleague Alia Afshar-Gandhi, she was a remarkable and dedicated person who wanted to change people's lives. NPR's Melissa Block talks to Afshar-Gandhi about Norgrove's work.