WELLESLEY, MA - APRIL 17: Crowds cheer on Boston Marathon runners in the iconic "scream tunnel" near Wellesley College on April 17, 2017, in Wellesley Massachusetts. (Photo by Kayana Szymczak/Getty Images)
WELLESLEY, MA - APRIL 17: Crowds cheer on Boston Marathon runners in the iconic "scream tunnel" near Wellesley College on April 17, 2017, in Wellesley Massachusetts. (Photo by Kayana Szymczak/Getty Images)