Sign1News Daily Update (2.21.22)

Today’s headlines:

-World leaders fear biggest war since WWII
-US braces for possible 40-degree temperature plunge this week
-Woman charged, accused of stabbing husband 140 times
-4th vaccine dose might be needed closer to fall
-FDA approves 1st app to deliver insulin doses
-Snapchat launches real-time location sharing feature
-Robot dogs could patrol US-Mexico border