One of the advantages of being older in the US
http://store.usgs.gov/pass/senior.html (or click "More" below).
Remember, To assure you always receive Nip Impressions, "whitelist" this address: jthompson@taii.com or You may also wish to consider providing a private email address out of the reach of those pesky IT people in your company. Just send it to jthompson@taii.com and put "For Nip Impressions Only" in the subject line.