Family members, friends and others are at the University of Arizona in Tucson tonight for a “Together We Thrive: Tucson And America” service to honor and remember the victims of Saturday’s shooting rampage.

President Obama will be among the speakers. First lady Michelle Obama is also in Tucson, and they have visited some of the victims and family members of those who did not survive. Six people were killed and another 13 were shot and injured when a lone gunman attacked a community event being held by Rep. Gabrielle Giffords (D-AZ).

We’re using the box below to live-blog before, during and after the service. Our updates will flow into the box automatically — there’s no need to hit your “refresh” button. Once the service gets going, you can also listen by clicking on the player in the box above. The ceremony is expected to begin at 8 p.m. ET and last about an hour. After the service, we’ll turn on the “comments” function in the live-blog box and we invite you all to share your thoughts if you wish: Copyright 2011 National Public Radio. To see more, visit http://www.npr.org/.