Fiona the hippo over the years

Officials are keeping watch on what is believed to be a spy balloon. (CNN, POOL, KURL, UNITED AIRLINES, TWITTER, @MARTININMONTANA, MICHAEL ALVERSON, @SPEAKERMCCARTHY, Twitter/@MartinInMontana)

A possible mental illness call led to an investigation into a range of criminal threats. (KCAL, KCBS, OBTAINED BY KCBS, TWITTER, LAPD, CNN, Obtained by KCBS/KCAL, Twitter/LAPD)

Remains found in Michigan are believed to be the bodies of three missing rappers. (WXYZ, BROADCASTIFY, TWITTER, DETROIT POLICE, FAMILY PHOTOS, CNN)

The Pentagon is tracking a suspected Chinese spy balloon over United States airspace. (CNN, Getty, KULR, Ashley McGowan, Michael Alverson)