article_snippet: Pictured from left: US Under Secretary for Political Affairs Wendy Sherman, US Secretary of State John Kerry, US Secretary of Energy Ernest Moniz and British Foreign Secretary Philip Hammond . '
article_snippet: Kerry and Iranian Foreign Minister Mohammad Javad Zarif have been in Lausanne for days to try to reach a preliminary deal by a self-imposed deadline of Tuesday.
article_snippet: Kerry and Iranian Foreign Minister Mohammad Javad Zarif held several rounds of talks on Saturday and met again on Sunday morning.
article_snippet: Fabius and Steinmeier joined talks on Saturday, and Fabius and Steinmeier counterparts from China,
article_snippet: Britain and Russia were to take part later on Sunday.