Maybe he thought it was a safe crossing for " penapedistrians" but either way it " seals" up another show on a happy note so there's nothing for him to " blubber" about.
It started excavating the - - the extension but they ran out of money and instead of dismantling the entire thing, they just decided to put concrete into the tunnel and seal it up that way.
This would provide shelter from solar radiation, protection from weather — Mars can get some pretty nasty dust storms in the spring — and could be sealed up and filled with air.
This was the last sample collected on Apollo 11, as Neil Armstrong's outside the LEM, the lunar excursion module, getting ready to seal up the rock box.