1: Lausanne , Switzerland ( CNN ) A roller-coaster series of talks wrapped up Thursday in Lausanne as a group of world powers known as the P5 +1 reached a framework agreement with Iran over the country 's nuclear program . 2: But the talks this week were , nevertheless , historic , particularly for the otherwise frozen U.S.-Iranian relationship . 3: This week 's talks on an Iranian nuclear deal framework are historic .
1: A roller-coaster series of talks 2: the talks this week 3: This week 's talks on an Iranian nuclear deal framework