11.   Some residents said the crossing at Liberty Church Road, which has no signal lights or mechanical crossing arms, was a tragedy waiting to happen.

12.   The goal is to ensure the new mechanical arm is ready to participate in the next station assembly flight.

13.   The mechanical arm is one of several devices and experiments on the agenda for this flight.

14.   The mechanical arm is to scoop up soil samples and place them in ovens for analysis by instruments designed by the University of Arizona.

15.   The mechanical arms will take a wafer from one kind of chemical solution and dip its hands in highly purified water before touching another chemical bath.

16.   The other is like a mechanical arm, with six joints that mirror the movement of a shoulder, elbow, forearm, wrist and hand.

17.   The mechanical arm has never before moved anything so big.

18.   There will be Japanese and European science labs, a Canadian mechanical arm, Russian power plants.

19.   Throughout the day, guitar picks on mechanical arms strike the strings as computer-controlled dampers press down on the frets, creating eerily beautiful music.

20.   When the signals go dark, six-inch mechanical arms spaced along the tracks automatically rise, triggering the emergency brakes of passing trains.