I'm trying to add the alt text from a cck image field in a Drupal 7 node template. Getting the image style url is done, but I can't figure out how to just get the alt text. This is what I have
<img src="<?php print image_style_url('160x160', $node->field_image['und']['uri']); ?>" alt="????" class="thumbnail" />
How does one just output the alt text?