Carl Levin actually said...

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

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

"Yes, sharing missile track information has the potential to enhance both United States and Russian ability to defeat projected Middle Eastern threat ballistic missiles."

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