who decides?

i was flipping channels last nite and saw yet another missing person on CNN last nite. another white girl. not to make that sound trivial. it's not. i'm just wondering, who decides that this college girl from alabama, the intern, the runaway bride, and the two little girls near chicago last month, get NATIONAL coverage? and why?

there have been SO many missing persons in the houston area. small children. ethnic children that have gone missing and not once did i see any of them on CNN.

why this sudden "craze" of missing persons coverage? not only missing persons coverage, but missing 'white girls' national coverage? has anybody else noticed that or is it just me?
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update: it's not just me
http://thepoliticalteen.net/2005/06/04/everyone-drop-what-theyre-doing-a-white-girl-has-gone-missing/

http://blackambition.blogspot.com/

http://injusticeanywhere.blogspot.com/2005/06/media-alert-pretty-white-girl-missing.html

http://www.broadwayworld.com/board/readmessage.cfm?thread=853336&boardname=off&dt=060805094547

http://www.tuckle.net/?p=3382

http://msnbc.msn.com/id/5325808/
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don't get me wrong. i do feel for the families and friends and do not wish this upon ANYONE. i hope for a safe return. i just also believe in "equal opportunity", so to speak.