Fernando Celis, an analyst at Mexico's National Committee for Coffee Organizations, said some have begun growing corn and other grains.

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One street away from one of Tucson's busiest thoroughfares, the Celis' home is in a neighborhood of largely middle-class, single-family residences.

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Tucson Police Chief Roberto Villasenor said Monday night that the "specialized K-9s (were) flown in" to help in the case of young Isabel Mercedes Celis, who was reported missing on Saturday morning.

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