The "Boston Strong" tribute was unveiled this weekend ahead of the 120th Boston Marathon.
The blue-and-yellow sign, which features the words "Boston Strong" and symbolizes unity in the aftermath of the 2013 Boston Marathon bombings, will be visible to marathon runners on April 18. It is located in the last mile of the race.
Massachusetts Gov. Charlie Baker and Boston Mayor Marty Walsh were on hand for the celebration, along with marathon Executive Director Thomas Grilk. The event took place Saturday at the Bowker Overpass at the intersection of Commonwealth Avenue and Charlesgate West.
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Baker said the sign is not only a tribute to the victims of the bombings, but also serves as motivation for the runners.
This year's race is the third since two pressure cooker bombs were set off near the finish line in 2013, killing three people and injuring more than 260.