Last April 15, two bombs exploded near the finish line of the Boston Marathon, killing three people and injuring more than 270 others.
A ceremony was held at the Hynes Convention Center on Tuesday afternoon. Former Mayor Thomas Menino, current Mayor Martin J. Walsh, Gov. Deval Patrick and survivors of the blasts addressed an audience of about 2,500 people.
Vice president Joe Biden was also present and closed the ceremony with a speech, during which he called the survivors and Boston's citizens an inspiration for the nation.
"We own the finish line," Biden said in conclusion to a rousing ovation.
A ceremony at the time of the explosions also took place. Church bells rang and the national anthem was sung before a moment of silence was observed at 2:49 p.m. ET.
The day also included a morning wreath-laying ceremony at the site of the blast that took the lives of eight-year-old Martin Richard, 29-year-old Krystle Campbell and 23-year-old Boston University student Lingzi Lu.
This year's Boston Marathon is scheduled for next Monday, April 21. It is estimated that more than 35,000 runners will take part, marking the most since the centennial running in 1996.