Every year, more than a billion people come together to celebrate Earth Day, but do you know how it all began? From first conception to a global green movement, we explain how Earth Day became the planet’s favorite holiday (and why it still matters today).

A Delta flight about to leave Orlando, Florida, was disrupted after a fire was spotted in one of the plane’s engines. There were no reported injuries, but the cause of the fire is still unknown.

Tornado damage was confirmed in Missouri amid Easter Sunday’s severe weather. Watch this video to see new drone footage of the aftermath in Guthrie, Missouri, a town located southeast of Columbia in Callaway County. A home and trees were shredded as the storm moved through the area.

Flash floods and tornadoes led to five deaths in Oklahoma as severe storms hit parts of that state as well as Texas and Missouri over the Easter holiday weekend. Tens of thousands lost power at the height of the storms, many roads were flooded and homes and other buildings were damaged.

An enormous dust devil towered high above Casa Grande in the Arizona desert on Easter Sunday. Drivers were pulling over to record the weather phenomenon; see it here for yourself and learn why this one was so impressive.