usually, mass mailings go out to individuals who are deemed likely to be interested in a memorial's construction.
these mass mailings have a sales pitch of sorts and ask for a donation.
for example, a lot of airline pilots or licensed pilots are likely to receive the letter on the flight 93 memorial.
some guys toss it in the trash, others send in $100
get enough of them to respond with $100 and you build whatever memorial you can afford.
usually how it works but not always.
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