(CNSNews.com) – On the fourth day of a nationwide “back-to-school” bus tour, Education Secretary Arne Duncan and Health and Human Services Kathleen Sebelius spent the day at schools in Colorado, eating lunch and line dancing with students. “It may have been a once-in-lifetime occurrence: two cabinet secretaries, one governor, two U.S. senators and dozens of students all line-dancing. Historic or not, the importance of the Let’s Move! back-to-school bus tour event at Lowry Elementary in Denver, was clear: Children who are healthy and active are better prepared to learn,” the e-mail update distributed by the Education Department on Tuesday states....