
NEW YORK - The United States believes that it needs to pursue active and  aggressive diplomacy with Iran to determine whether a diplomatic  solution on Tehran's nuclear program is achievable, a senior US  administration official said on Saturday.
 
 "In order to really seriously test whether we can reach a diplomatic  solution with Iran on its nuclear program, we believe we need to engage  in very active and very aggressive diplomacy," said the US official, who  spoke on condition of anonymity.
 
 The official, who was speaking ahead of bilateral talks between senior  US and Iranian officials in Geneva set for June 9-10, said Washington  had not yet seen "the kind of realism on the Iranian side that we need  to see."