UVALDE, Texas (AP) President Joe Biden grieved with the shattered community of Uvalde on Sunday, mourning privately for three hours with anguished families left behind when a gunman killed 19 schoolchildren and two teachers . Faced with chants of do something as he departed a church service, Biden pledged: We will.

At Robb Elementary School, Biden visited a memorial of 21 white crosses one for each of those killed and first lady Jill Biden added a bouquet of white flowers to those already placed in front of the school sign. The couple then viewed individual altars erected in memory of each student, the first lady touching the childrens photos as they moved along the row.

After visiting the memorial, Biden attended Mass at Sacred Heart Catholic Church, where several victims families are members, and one of the families was in attendance.