Parents everywhere, take heart: Even the Obamas have trouble getting their kids to keep all the promises made when begging for a pet. "I got up at 5:15 a.m. in the morning to walk my puppy," first lady Michelle Obama said Thursday of Bo, the Portuguese Water Dog who joined the family Easter weekend, fulfilling President Obama's campaign promise to daughters Malia, 10, and Sasha, 7. "Even though the kids are supposed to do a lot of the work, I'm still up at 5:15 a.m. taking my dog out. So for everyone who has a child asking for a puppy...