 Riot squad of Boston police give demonstration on Common. |
 Riot squad of Boston police give demonstration on Common. |
 Boston police fire volley on Boston Common, Police Parade |
 Demonstration oil fire - foamite used to put it out. |
 Oil fire demonstration - foamite used to put it out. |
 Old fire demo. Foamite put the fire out. |
 Oil fire demo: foamite put the fire out. |