The first thing I always do is google the quote to see if they've left something out, or changed it---usually they've taken it out of context. For example, this is the context she was talking within:
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On 16 December 1998, Nancy Pelosi, a Congressional representative from California and a member of the House Intelligence Committee, issued a statement concerning a U.S.-led military strike against Iraq:
As a member of the House Intelligence Committee, I am keenly aware that the proliferation of chemical and biological weapons is an issue of grave importance to all nations. Saddam Hussein has been engaged in the development of weapons of mass destruction technology which is a threat to countries in the region and he has made a mockery of the weapons inspection process.
The responsibility of the United States in this conflict is to eliminate weapons of mass destruction, to minimize the danger to our troops and to diminish the suffering of the Iraqi people. The citizens of Iraq have suffered the most for Saddam Hussein's activities; sadly, those same citizens now stand to suffer more. I have supported efforts to ease the humanitarian situation in Iraq and my thoughts and prayers are with the innocent Iraqi civilians, as well as with the families of U.S. troops participating in the current action.
I believe in negotiated solutions to international conflict. This is, unfortunately, not going to be the case in this situation where Saddam Hussein has been a repeat offender, ignoring the international community's requirement that he come clean with his weapons program. While I support the President, I hope and pray that this conflict can be resolved quickly and that the international community can find a lasting solution through diplomatic means.
(In this statement Rep. Pelosi was not urging that action be taken against Iraq in order to destroy its WMD technology; she was expressing support for attacks that had already begun with that purpose as their stated objective.)
<<snip>>
http://www.snopes.com/politics/war/wmdquotes.aspThe above explanation came from this link---there are many more quotes and explanations at that link.