The memorial at the barricade at Boylston and Berkely streets grew to include more flowers, medals, and stuffed animals.

A teddy bear at the barricade memorial with a note saying "No more hurting people," the same message bombing victim Martin Richard had written in a widely-circulated image.

President Barack Obama spoke to Boston Athletic Association volunteers at Cathedral High School with Boston Mayor Thomas M. Menino and Governor Deval Patrick.

President Obama met Boston Athletic Association volunteers after an interfaith service.

Michelle Obama's motorcade arrived at Brigham and Women's Hospital, where she was meeting victims of the marathon bombings.

US Senator Elizabeth Warren left the cathedral after the service with her husband, Bruce Mann.

”The world will return to this great American city to run harder than ever,” Obama said during the service. “Bet on it!’’

Patrons at BoMA restaurant watched President Barack Obama speak across the street from the Cathedral of the Holy Cross.

Hundreds gathered outside the Cathedral of the Holy Cross.

Priscilla Winter of Dorchester, Brandi Artez of the South End, Winter’s daughter Priscilla Rorie Winter, and Roberta Mankus of Holbrook listened to Obama’s speech.

Mayor Thomas M. Menino struggled to his feet at the podium. Menino fractured his ankle last week.

“We are one Boston. Nothing can tear down the resilience of this city,” Mayor Thomas M. Menino said.

President Obama sat in the Cathedral of the Holy Cross with Michelle Obama and Governor Patrick.

Boston University students Jake Dore, of Manchester, N.H., Sunny Abraham, of New York, kept warm outside the Cathedral of the Holy Cross as Obama spoke.

The South End cathedral was filled to capacity.

Business at Boston City Hall came to a halt as employees watched the service.

Cellist Yo Yo Ma played.

Members of the Boston Children’s Chorus cried as they sang.

Entering the service are Massachusetts US representatives William Keating, John Tierney, Joseph P. Kennedy III with Vicki Kennedy, the widow of late Senator Edward M. Kennedy, Edward Markey and Stephen Lynch.

Boston Mayor Thomas M. Menino, who fractured his ankle last week, passed the Obamas as he was wheeled into the church..

A man in a Boston Marathon jacket bowed his head as he waited for the service to begin.

President Obama greeted Representative Edward Markey as Michelle Obama greeted Governor Patrick at Logan Airport.

Former Massachusetts governors Jane Swift (left) and Mitt Romney in the Cathedral of the Holy Cross.

Boston Police Department officers in pews at the Cathedral of the Holy Cross before the memorial service.

Two people embraced in the cathedral.

Attendees waited for the service to begin.

Boston Police circled the Cathedral of the Holy Cross in Boston’s South End before President Obama’s arrival.

Daughters of Mary of Nazareth ate donuts while waiting in line for free tickets to a prayer service Thursday outside the Cathedral of the Holy Cross.

Security set up outside the South End church on Thursday morning.

People waited in line for free tickets to the service. President Obama will speak during the service.