As Boston prepares for the 130th Boston Marathon, the city has implemented enhanced security measures to ensure the safety of the 30,000 runners and spectators. The marathon weekend kicks off with the Boston Marathon Expo at the Hynes Convention Center, running from Friday to Sunday, where participants can collect race materials and shop for official gear. Additionally, the Boston Marathon Fan Fest, located at City Hall Plaza, opens today at 3 p.m., offering live music, meet-and-greets with marathon champions, and various food vendors. The weekend's first athletic event, the B.A.A. 5K, is scheduled for Saturday morning at 8 a.m., expecting around 10,000 runners. Boston Mayor Michelle Wu has urged everyone to remain vigilant and report any suspicious activity to public safety officials.