other like to turn it over to roessler. can i let him give his briefing and then i will come back? chief roessler: on behalf of fairfax county government, our hearts go out to the students that were injured and the staff that were injured and all the parents and everyone in the community. we hope for their speedy recovery and our prayers and thoughts are with them at this time. from a police perspective, as wers indicated, there was no evidence of criminal activity and this appears to be a chemical fire accident in nature at this point in time. office has thels primary investigator lead on this with support from the police department. thank you. chief bowers: now i will take questions. >> were any students in halloween costumes? not to mysler: knowledge. >> where the kids playing around? chief bowers: to the best of my knowledge, they were in a classroom activity and that is all we can report at this time. one of the injured student said that they were experimenting with changing colors and fire and that the injured were in the first row of the classroom. can you support that? i ca