By Tara Vocino
Approximately 70 apparatus from area police depts. from Boston, Revere, Lynn, State, Swampscott, Berklee, Revere, Nahant, Saugus, Everett, Metro SWAT, and Secret Service drove by to welcome leukemia survivor Cristopher Chavarria, 11, home from Children’s Hospital on Tuesday outside their Newman Street home.
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