Misleading headlines...

I know, I know, supposedly these pollsters are such experts that they can take a group of people and transition this into "valid numbers". Yet everytime I read a headline such as Poll: Most Americans Opposed to Bush's Iraq Plan and I read the beginning paragraph:

A majority of Americans oppose sending additional troops to Iraq as outlined by President Bush in his nationally televised address Wednesday night, and just one-in-three Americans said the plan for more troops and a stepped up combat efforts by Iraqi forces make victory there more likely, according to a new Washington Post-ABC News poll.

Then, I scroll all the way down thru the whole article looking for how many people participated in the poll, to be able to gauge the chances of how valid this poll really is. This one?

This Washington Post-ABC News poll was conducted by telephone Jan. 10, among a random national sample of 502 adults. The results have a 4.5-point error margin.

So, the majority of 502 people who answered their phone that night oppose sending additional troops to Iraq. Perhaps a true majority of Americans really do feel that way but, just like many question Global Warming? I really question the validity of 502 people equally "A Majority of Americans".