Sometimes words AREN'T enough

From an article in The Washington Post about a bone marrow donor meeting the 5 year old who received his marrow as an infant:

In summer 2000, when the National Marrow Donor Program searched its registry of about 4 million names (now more than 5 million), it found just four perfect matches for Cameron. All four were contacted. Only Young called back.

It's not enough to be able to say "I'm on the National Marrow Donor Registry." One actually needs to act when called upon to do so.