These are the most frequently used words in this book.
agreed
air
aircraft
airlines
airplane
although
american
another
army
aviation
board
boeing
bomber
build
built
business
called
charlotte
commercial
company
contract
costs
days
design
designed
division
donald
douglas
down
during
early
engine
engineer
engineering
even
father
feet
few
field
first
flight
fly
flying
general
get
go
got
great
heinemann
high
jet
job
knew
later
lines
long
los
man
martin
military
million
money
navy
new
now
officials
orders
part
passengers
pilot
plane
plant
president
problems
production
proved
raymond
service
should
son
speed
states
still
take
test
three
time
told
took
transport
two
united
use
used
war
went
wing
work
world
years