Jens Buttner/ Reuters
- Israel could transfer up to eight Patriot missile batteries to Ukraine.
- Israel is upgrading its air defense and looking to retire older Patriot batteries.
- Ukraine has long coveted more of the $1 billion US-manufactured Patriot systems.
The US is involved in discussions about the possibility of transferring up to eight Patriot air defense batteries from Israel to Ukraine, in what would be a major boost for the latter in its fight against Russian President Vladimir Putin's invading forces.