for these mill eemillenials, it just a national tragedy. >> the president is dead. >> it is personal. >> he didn't wear red because it had been associated with the assassinations. >> spy-cam, undercover on planet penguin. a high-tech infiltration. for the robots, the eyes are the windows to more than just the soul, they're giving us a bird's eye view of the romance, the dramas, and the all-out waddle war. >> announcer: keep it right here, america, "nightline" is back in just 60 seconds. ♪ [ male announcer ] united is rolling out global, satellite-fed wi-fi to connect you even 35,000 feet over the ocean. ♪ that's...wifi friendly. ♪ >>> good evening. thank you for joining us. getting ready to go home for the holidays? even if you bought your plane ticket you are not home free yet. airlines make billions off those pesky extras you just can't do without. and if you are traveling with kids. the numbers only fly higher. abc's linz linzie davis found o what you need to save big on tonight's "nightline" "on the lookout." >> reporter: it is 7:00 in the morning. >> we call a bug out. >> r