In addition to song downloads, Apple may offer unique features such as a facility to restart a song.

FORBES: Apple's iRadio Signals Getting Clearer

"We won't make a decision (to approve the facility's restart) unless we're satisfied that public health and safety will be protected, " Jaczko told reporters.

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By "disable, " Hill said, the agreement means making it difficult to restart a nuclear program by sealing the facility and removing certain components that would not be easy to replace.

CNN: N. Korea to disable nuclear complex

The experts will make it difficult to restart a nuclear program by sealing North Korea's main nuclear facility and removing certain components that would not be easy to replace.

CNN: Korean leaders sign peace pledge