WASHINGTON — A memo from Defense Secretary Robert Gates to the White House warned that the United States lacks a nimble long-term plan for dealing with Iran's nuclear program, according to a published report.Gates wrote the three-page memo in January and it set off efforts in the Pentagon, White House and intelligence agencies to come up with new options, including the use of the military, The New York Times said in its Sunday editions, quoting unnamed government officials. White House officials Saturday night strongly disagreed with the comments that the memo caused a reconsideration of the administration's approach to Iran."It is absolutely false that any memo touched off a reassessment of our options," National Security Council spokesman Benjamin Rhodes told The Associated Press. "This administration has been planning for all contingencies regarding Iran for many months."One senior official described the memo as "a wake-up call," the paper reported, but the recipient of the document, Gen. James Jones, US President Barack Obama's national security adviser, told the newspaper in an interview that the administration has a plan that "anticipates the full range of contingencies."Pentagon spokesman Geoff Morrell, who did not confirm the memo Saturday night, said the White House has reviewed many Iran options."The secretary believes the president and his national security team have spent an extraordinary amount of time and effort considering and preparing for the full range of contingencies with respect to Iran," Morrell said.The US is pressing for new international sanctions against Iran. The memo contemplates a situation in which sanctions and diplomacy fail to dissuade Iran from pursuing nuclear capability, the Times said.Obama set a deadline of the end of 2009 for Iran to respond to his offer of dialogue to resolve concerns about Iran's accelerated nuclear development.Iran spurned the offer, and since then the administration has pursued what it calls the "pressure track," a combination of stepped-up military activity in Iran's neighborhood and a hard push for a new round of international sanctions that would pinch Iran economically.Gates and other senior members of the administration have issued increasingly stern warnings to Iran that its nuclear program is costing it friends and options worldwide, while sticking to the long-held view that a US or Israeli military strike on Iranian nuclear facilities would be counterproductive.Obama and other administration figures have drawn a line that says Iran will not be allowed to become a nuclear state, but they have not spelled out what the United States would do if Iran gained the ability to produce a weapon but does not actually field one.Four senior administration officials told Congress last week that Iranis perhaps a year away from being able to build a weapon but that itwould take two- to five additional years to turn the device into aneffective weapon that could be launched against an enemy.Iran claims its nuclear program is intended for energy production, not weapons."All we really know is that Iran is widening and deepening its nuclearweapons capabilities, David Albright, founder and president of theInstitute for Science and International Security, told the AP. "Wedon't have any insight into what they're thinking about doing — whetherthey'll just live with a nuclear weapons capability which will probablyinclude learning more about nuclear weapons themselves, or they'llactually build them."