DENVER (AP) — Charles Palmer is a hardy 71-year-old former Marine and Vietnam veteran who trains cockatiels to say "Semper Fi" and "Whatcha doin', man?" He also loves fruit — and especially melon for lunch. "He's never one to get sick," said his wife, Tammie. The Colorado Springs man ate a cantaloupe that was purchased in mid-August, his wife said. Within several days, he was overcome by an excruciating headache. The next morning he was extremely weak and gripped by dry heaves, his wife recalled. "I started slapping his face and saying, 'You've got to talk to me,' but he...