Misha Alekhnovich died

August 5, a category 6 whitewater expedition..

his papers:
http://www.math.ias.edu/~misha/papers/index.html

accident reports (in Russian):
http://russhatter.livejournal.com/66533.html
http://www.whitewater.ru/doc.php?2006-Chulyshman-otchet
http://teormin.ifmo.ru/blog/?p=42

upd: more links:
http://aristk.livejournal.com/20492.html
http://lzh.livejournal.com/48779.html
http://gaz-v-pol.livejournal.com/11604.html