parents are no longer married, but they stand together in their belief that the boy's stepmother kerry horman is responsible for his disappearance. his mother says that she has a severe hatred for her son and could have injured him in the worst possible way. >>> if you have asthma, you might want to defriend facebook. a group of italian doctors warn that the social networking site could trigger asthma attacks. the physicians report treating an 18-year-old man whose asthma attacks were sparked by logging onto facebook and seeing how many men his ex-girlfriend had friended. and when his ex blocked him from her profile, his condition got worse. the doctor's findings are published in the medical journal "lancet." >>> some of our nation's bravest wounded warriors have a new tool to heal after leaving the battlefield. amputees at san antonio's brook army medical center are getting back on their feet with a bionic power foot system. it uses sensors and a moater to propel the foot through each step, keeping simple walking from being a drain on people who have lost a leg. >> felt like a real leg again