<s>
It	O
is	O
the	O
third	O
version	O
of	O
the	O
Air	B-Device
Traffic	I-Device
Controller	I-Device
series	O
of	O
simulations	O
.	O
</s>
<s>
The	O
objective	O
of	O
each	O
level	O
is	O
the	O
reach	O
a	O
required	O
number	O
of	O
points	O
to	O
pass	O
while	O
avoiding	O
many	O
of	O
the	O
dangers	O
of	O
being	O
an	O
air	B-Device
traffic	I-Device
controller	I-Device
.	O
</s>
