CultureFree divingTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoCulture02/25/2014February 25, 2014Ilka Michaelis loves to spend a long time underwater, without a snorkel or a scuba tank. She holds two German records in free (or "apnea”) diving.https://p.dw.com/p/1BElZAdvertisement