Photos Of Boston Marathon Crowd Cheering On The Runners Are A Powerful Symbol Of "Boston Strong"

On Monday, more than 30,000 people participated in the 2015 Boston Marathon as spectators lined the streets to cheer them on. It's the second race since the 2013 bombing that killed three and injured hundreds of runners and bystanders, leading to heightened security all along the route this year. The first set of racers took off at 8:50 a.m. and crowds started gathering early along the 26.2 mile course to offer their support.

Many bombing survivors are running the race this year, after long recoveries from their injuries. The 119th Boston Marathon falls in the middle of the bombing trial that found the suspect, Dzhokhar Tsarnaev, guilty of 30 different charges of terrorism and murder. Beginning Tuesday, the jury will decide whether to sentence him to life in prison or death for the attack. Following the bombing, the marathon has had much stricter security measures, with spectators lining up early to have bags inspected before entering the route's barriers. Drones were also banned from the course.

Marathons often draw creative inspirational posters from onlookers, and there was no shortage of witty banners at the Boston Marathon. Since the attack two years ago, the marathon's slogan has been "Boston Strong," so members of the crowd and the official marathon team incorporated the saying into t-shirts, banners, and flags. Despite the light rain and chilly weather, spectators were dedicated to cheering on the runners and continued to do so throughout the morning. Here's a look at some of the 2015 Boston Marathon's spectators.