olivia tuberculosis was about to start her final year of a degree in entrepreneurship and management. her cushion sin the only u.s. citizens a standout soccer player who studied biology at sonoma state. lorkin miller studies medicine. talented and modest. nick lie chuter had been to ghana to help primary school students learn english. imir walsh a medical student described as smart and beautiful with much to offer. >> no matter who it happens to when he happens they're young and their whole life ahead of them it's very tragic. i feel the whole community is morning right now. >> reporter: there is a special memorial mass happening tonight remembering those injured. happening at cathedral christ the light. >> engineers are investigating the cause of that balcony collapse. several investigationings takes place and structural engineers say there's so much evidence they should be able to come to a solid cop collusion quickly. as of right now experts saying a combination water damage and dry rot. >> the engineers who are examining that, that the wood was coming off quite easterly in their h