WASHINGTON — Negotiators are quietly hammering out the details of a 14-point framework for peace talks between the US and Iran — and nuclear elements are finally on the table for discussion. The emerging memorandum of understanding — described as a one-page agreement — would serve as the foundation for a broader treaty to be negotiated later, according to sources familiar with the talks. The US has offered provisions that would see Iran halting uranium enrichment, the easing of some US