. >> ali kalmua is german-moroccan. he's lived in in the town of kerpen for more then 20 years. sometimes he runs into friends at the newsstand. there's always someone here to talk to. people exchange pleasantries and chat about events of the day. and they also talk about kerpen's integration projects for refugees, something ali kalmua is actively involved with. >> we work well together here in kerpen and live peacefully with one another. in terms of integration, we've been very successful. >> more than 70,000 people live in kerpen. a tenth of them moved here from other countries, many as guest workers who found jobs in coal mines or the auto industry. the small industrial city west of cologne has become their home. they are proud of their city and feel a part of it. but what happened in cologne on new year's eve came as a shock to many. hundreds of women were sexually assaulted and robbed. preliminary arrests were made in kerpen's refugee camp. two algerians were accused of possessing stolen cell phone. one of them allegedly took part in the attacks on women. someone who knows