/news/b/articles/archive/2016/11/30/russian-startups-embark-on-investment-quest-at-slush-startup-fest-in-helsinki.aspxHELSINKI — Slush , the biggest event for tech startups in northern Europe, opened Wednesday in the Finnish capital Helsinki with the unmistakable strains of Finnish cello metal music, a pyrotechnics show and a record 17,000 participants, including7.x Production