He was on the trip of his life. Then two choppers hit.

Six people are dead after a mid-air crash over a car lot in Rio, including star Oliver Tree.

A dream trip to Brazil turned into a nightmare in seconds.

Millions of fans are now grieving for a young star who was just starting to see the world.

WHAT HAPPENED

On Sunday morning, two choppers crashed in the sky above Rio de Janeiro.

The crash happened right over a car store.

Six people died in the crash.

Among them was 32-year-old American singer and star Oliver Tree.

He was in Brazil for his big world tour.

Witnesses saw a scary scene.

One rider tried to jump out before the craft hit the ground in flames.

What the evidence shows

6 people died in the crash, including 2 pilots and 4 young friends.

• The victims include Oliver Tree (32), Gaspar Prim (23), Lucas Vignale (29), and Lucas Brito Chaves (21).
• The crash happened on a Sunday morning in the Recreio dos Bandeirantes area.
• 1 witness saw a passenger jump from a burning chopper to escape the fire.
• 2 aircraft fell to the ground and set cars on fire below.

THE BIGGER QUESTION

Why were two choppers flying close enough to hit each other on a clear day?

Rio has busy skies, but flight rules are meant to keep people safe.

This crash makes us look at flight safety in big cities.

Are we doing enough to track these flights before lives are lost?

THE OTHER SIDE

Flight officials say they are searching the wreck to find out what went wrong.

They ask the public not to blame the pilots yet, as gear failure could be the cause.

This claim is strong, as early reports do not show who was at fault.

WHAT HAPPENS NOW

Fans around the world are mourning the loss of their favorite stars.

This crash will likely lead to calls for safer flight rules in Rio.

For now, families are left to bring their loved ones home from a trip that was meant to be a joy.

WHAT WE STILL DON'T KNOW

1. Why did the two choppers get so close to each other?
2. Did a mechanical failure cause one of the craft to lose control?
3. Who was the passenger who tried to jump to safety?