(CNN)Here's what you might have missed on CNN on Friday:
-- Russian aircraft reportedly have been spotted off Alaska four times this week, and one US official calls the acts "strategic messaging."
-- One-bed motel rooms and Cialis refills reveal what investigators say was a Tennessee teacher's plot to engage in unlawful sexual activity with a student, a criminal complaint says.
-- Here's what Education Secretary Betsy DeVos wants to do to your student loans.
-- Think twice before gulping down that diet soda. Artificially sweetened drinks may be associated with stroke and dementia.
-- Princes William and Harry and the Duchess of Cambridge open up about mental health.