Survivors of the Boston Marathon bombing returned to the site of the deadly blasts on Tuesday as they marked the second anniversary of the tragedy. Among them, the family of eight-year-old Martin Richard, the youngest victim to lose his life in the April 15, 2013 attack, headed to Boylston Street to help officials unveil commemorative banners. Four orange signs each bearing a white heart and the word 'Boston' were placed at the site. They were mounted on poles wrapped in blue and yellow flowers, the marathon's colors, to mark the tragedy that took three lives and left more than 260 others injured. Martin's older brother Henry and younger sister Jane, who lost a leg in the explosion, helped unwrap one of the flags on the street as bagpipes played during the low-key ceremony. Scroll down for video . Somber: The Martin family, whose son Richard was killed in the Boston bombings, walk down Boylston Street with Boston Mayor Marty Walsh, left, ahead of a ceremony to mark two years since the tragedy . Emotional: Jane, who lost a leg in the blast, shares a smile with her father while her mother wipes away a tear . Ceremony: Jane and Henry Martin remove a drape covering a memorial banner to honor the victims. In total, four large orange banners were unveiled near the explosion sites on Tuesday morning . Memories: The family takes a moment to reflect at the scene as a ceremony to mark the anniversary begins . The family of Krystle Campbell, who also died in the attacks, helped unwrap another banner with the help of Governor Charlie Baker. Also at the ceremony was Jeff Bauman, who lost both legs in the bombings. His ashen face was captured in a now-iconic photograph as he was wheeled away by strangers. One of those strangers, Carlos Arredondo, is now a close friend. Arredondo, who became known as 'the man in the cowboy hat' was also at the site on Tuesday morning to greet Bauman as he walked on prosthetic limbs. 'We're here to pay tribute to the people who lost their lives,' Bauman told WFXT-TV. They were joined by city officials including Mayor Marty Walsh and Governor Charlie Baker. At 2.49pm, a moment of silence was held to mark the moment the first of two bombs exploded near the finish line two years ago, while church bells sounded throughout the city. Well-wishers visited the site of the explosions throughout Tuesday to pay tribute to the young people who had lost their lives, and stopped to pay their respects at a memorial bearing their names. Mayor Walsh has declared April 15 'One Boston Day,' on which Bostonians are encouraged to perform random acts of kindness and generosity. Always remembered: Jane Martin sits on a new bench with the words 'Keep Running Boston' and 'Boston Strong' written across it outside the fire station on Boylston Street . Fitting right in: Jane tries on a firefighter's helmet during a visit to the Boylston Street fire station . Proud: She grins alongside her mother Denise, father Bill and big brother Henry inside the fire station . Thankful: Denise Richard, who was hit in the head by shrapnel in the bombings, looks at banners signed by members of the public after the attack and now hanging at a fire station on Boylston Street . 'April 15 is a date that has come to stand for our city's deepest values,' he said as he announced the new tradition. 'In many respects, those most affected by the events of two years ago have shown us all the way back - with their courage, grace and determination,' Governor Baker said in a statement released after the ceremony. 'They honor the past, remember and treasure loved ones lost and injured, and look forward to a better future. We should strive to do the same.' Another victim who lost a leg in the bombings, Rebekah Gregory, took to Facebook on Tuesday morning to describe her disbelief that two years had already passed. She was at the marathon with her young son, Noah, and was less than 10 feet from where the first bomb exploded. She needed 17 surgeries and eventually had her left leg amputated last year. Last month, she testified against the surviving bomber, Dzhokhar Tsarnaev, in his trial. Strong: Jeff Bauman, who lost both of his legs in the bombings, is pictured with his wife Erin and their daughter, Nora Gail, as they walk down Boylston Street in Boston this morning . Incredible: He was accompanied by Carlos Arredondo, who helped save his life two years ago . Close friends: The two men have built a close friendship since the day of the blast . Side by side: Arredondo, whose adult sons both died in the years before the marathons, helped save Bauman's life after he was hit by the bombs. They two men are seen speaking with reporters on Tuesday . Tribute: A man touches a memorial to the victims, from left, MIT police officer Sean Collier, 29-year-old Krystle Campbell, 23-year-old Lingzi Lu and eight-year-old Martin Richard, who were killed by the two bombers . Memorial: The new banners show white hearts with the word 'Boston' inside. They have been placed at the top of lampposts, which have been decorated by flowers in blue and yellow - the marathon's colors . 'It is extremely emotional to look back on the last two years of my life,' she wrote. 'To remember what it felt like to be bleeding out on the pavement, wondering if I would ever see my child's smile again... 'It's been a long road. Some days, I'm not quite sure how I have made it out of the bed. And if I'm being really honest, a few times I haven't. 'But no matter what, there is one thing that I always keep in mind. I am BLESSED. And no matter how hard someone tries, they will never be able to take that away from me.' She plans to run the last three miles of the marathon next Monday. She also visited the site last year, but was pushed in a wheelchair as she struggled with issues with her leg. 'This time I won't be laying on the ground in pieces, or having to be assisted because I can't do things on my own,' she wrote. Support: A man wearing a shirt reading 'Boston Strong' and 'Survivor' walks near the ceremony on Tuesday . Respects: A passerby wearing a t-shirt honoring Martin pauses near one of the two explosion sites . Reflection: People stop by the memorial at the scene of the first explosion on the marathon route . Heartbreaking: A group of women gather near the site during the moment of silence on Tuesday afternoon . Powerful: A bunch of yellow and blue flowers lay at the scene of the first blast in Boston on Tuesday . 'This time...the only thing hitting the ground will be my running shoe, as I show myself and the rest of the world that I am back, stronger than ever....and there is NO stopping me now.' Three people were killed and more than 260 others were wounded in the April 15, 2013 attacks and the two bombers were cornered days later, after they shot dead an MIT police officer. One of the bombers, Tamerlan Tsarnaev, was killed during a shootout with police in Watertown. The surviving bomber, Dzhokhar Tsarnaev, 21, was last week convicted of 30 counts during his federal trial. The jury is now deciding whether he should receive the death penalty but they have taken a break until next Tuesday. This year's marathon will be held next Monday. Missed: Martin Richard, pictured, was watching the marathon near the finishing line when he was killed . Victims: Boston University graduate student Lingzi Lu, 23, (pictured left) and restaurant manager Krystle Campbell, 29, (right) also lost their lives in the bombings on April 15, 2013 .
A ceremony was held on Boylston Street on Tuesday morning to mark two years since the April 15, 2013 bombings . The family of eight-year-old Martin Richard, the youngest victim to lose his life, helped unveil commemorative banners at the site . Jeff Bauman, who lost both  his legs, also walked along the street on his prosthetic legs with his wife Erin and their baby daughter Nora . He also greeted Carlos Arredondo, who helped save his life . A moment of silence was also held at 2.49pm to mark the first of the explosions, which killed three people and left more than 260 injured .