Image by leodelrosa... via Flickr by Karyn Buxman Cancer. It's not the type of thing you ask for -- usually. Who'd want it? A life-changing, sometimes life-ending disease. Cancer's so scary that there are people who won't say the word aloud...but I was saying it regularly, begging God to let me be the one with cancer. My son, a strong, smart, energetic 22-year-old junior at the University of Missouri, woke up one morning with an aching chest. It turned out to be a malignant tumor, and the start of my most fervent prayers. "Please. I've had a great life. Let it be me -- not him." I...