Carl Levin actually said...

General O'Reilly, you have indicated previously that Russian radar data would be useful in enhancing our missile defense capability relative...

Yes, sharing missile track information with Russia would improve our ability to defeat North Korean ballistic missiles.

Yes. Sharing missile tracking data would not necessarily reveal capabilities of, or vulnerabilities to, the system.

Cooperation with Russia on missile defense has long been a priority for both Republican and Democratic administrations.