Residents across Boston on Wednesday observed One Boston Day, the second anniversary of the Boston Marathon bombings that killed three and injured more than 260 people. The inaugural observance was intended to honor the victims of the 2013 attack, as well as survivors and first-responders. It celebrates the "resiliency, generosity and strength of the City of Boston on April 15," a statement from Mayor Martin Walsh said.

Two years ago, Chechen-American brothers Tamerlan and Dzhokhar Tsarnaev detonated two pressure-cooker bombs near the finish line of the annual Boston Marathon. In the following days, the Tsarnaevs carjacked a vehicle and killed a Massachusetts Institute of Technology police officer before engaging in a shootout with police, during which Tamerlan Tsarnaev died. Dzhokhar Tsarnaev was arrested four days after the bombings. He was found hiding in a boat in a backyard in Watertown, Massachusetts.

Prosecutors suspected the brothers were motivated by Islamist extremism.

At 2:49 p.m. Wednesday, the exact time the first of two bombs detonated near the finish line, the city will hold a moment of silence. Church bells will ring as Bostonians stop to remember the bombing victims, said a news release from the mayor's office. People outside the city are encouraged to participate as well. You can livestream the moment of silence here.

Walsh and Massachusetts Gov. Charlie Baker started the observance Wednesday by unveiling honorary banners on Boylston Street, the site of the explosions. The four bright orange signs were mounted on poles decorated with knit yellow and blue flowers, the website of WBZ-TV and WBZ-AM reported. The politicians were joined by the families of victims Martin Richard and Krystle Campbell.


Other One Boston Day events include a Red Cross blood drive, a walk, a sneaker drive for the homeless, a park cleanup and a church service. Elementary school students will meet with firefighters and police officers to give them cards and pizza, and the local Museum of Science will give visitors free admission to the Butterfly Garden to reflect on the bombings.

This year's Boston Marathon is set for Monday, and the trial of surviving bombing suspect Dzhokhar Tsarnaev is scheduled to resume Tuesday. A jury recently found Tsarnaev guilty on all 30 federal charges and will now consider whether to sentence him to death or life in prison.