was landing? the weather / while it / What was / like
What was the weather like while it was landing?
did / Piccard / in 1999? / What / promise
What did Piccard promise in 1999?
plane landed? / Did the / batteries have / energy when the / more or less
Did the batteries have more or less energy when the plane landed?
the plane? / it take / How / to build / long did
How long did it take to build the plane?
international / What was / journey? / first / Solar Impulse's
What was Solar impulse's first international journey?
do when the / did people / What / landed / plane
What did people do when the plane landed?