Construction of the Samuel Oschin Air and Space Center will be completed by mid-2025.

The final beams raised into place were signed by members of the construction team at California Science Center.

The California Science Center reached a major milestone in construction of the future Samuel Oschin Air and Space Center today with a ceremonial topping out celebration. Gayle Anderson reports

Some of the final steel beams have been placed atop the building where the California Science Center will display the Endeavour space shuttle.

Some unusual cargo was hauled through the streets of Los Angeles Wednesday as a pair of massive rocket motors made the last leg of their journey to Exposition Park, where they'll be part of the Space Shuttle Endeavour display.