BETHESDA, Md. — Fresh from his weeklong trip through Asia, President Barack Obama is taking time to catch up on dad duty. The president and first lady Michelle Obama stopped by 8-year-old daughter Sasha's school Friday morning. White House officials said they were visiting Sidwell Friends School in Bethesda, Md., for a school activity, but declined to elaborate. Although Obama has no public events planned Friday, it's a busy time for him.