First, the telephone records acquired under the program have no connection to any specific FBI investigation at the time of their collection. Second, because the records are collected in bulk — potentially encompassing all telephone calling records across the nation — they cannot be regarded as "relevant" to any FBI investigation as required by the statute without redefining the word relevant in a manner that is circular, unlimited in scope, and out of step with the case law from analogous legal contexts involving the production of records. Third, the program operates by putting telephone companies under an obligation to furnish new calling records on a daily basis as they are generated (instead of turning over records already in their possession) — an approach lacking foundation in the statute and one that is inconsistent with FISA as a whole. Fourth, the statute permits only the FBI to obtain items for use in its investigations; it does not authorize the NSA to collect anything.