Category:
The general category of news you are interested in.

Created Between:
You may enter dates in the following formats:

• m/d/yy
• m/d/yyyy
• m/d
• m/yyyy
• yy
• yyyy

Media Type:
The general type of photos you are interested in.

Person:
People featured in the photo.

Orientation:
Allows restricting the orientation of a photo.

Photographer:
The photographer who took the photo.

Color:
Allows restricting the color of a photo.

City & State:
You can enter either the full name or abbreviation for a state.

Source:
The source the photo came from.

Country:
You may enter either the full name or abbreviation for country. Some special country names are as follows:

• XUN, "United Nations"
• XSP, "In Space"
• XIF, "In Flight"

Group Events:
This option will return results grouped by event similar to what you see when clicking a category link from the menu on the left.

Event:
This searches the title of a photo, this is the first line of information displayed below each photo.

Sort:
Allows you to sort results. Creation dates are when the photo was taken, while submit dates are when the photo was added to this website.
For instance a photo of Dwight D. Eisenhower could have been taken in 1953 but added to this website last week.