Tells us “Is it possible to serve as a need greater in Brooklyn NY? Recently a special witnessing campaign was set up in conjunction with with a Native American [(Amerindian)] festival held in Brooklyn. Literature carts and a booth were.
Witnesses are all "ministers". They serve others in a voluntary work, all free of charge. Here they are distributing an Invitation to everyone, inviting them to the Memorial of Christ's death, the most important meeting of the year.