11.   Can they use the retractable roof at Bank One Ballpark to give games that authentic outdoor feel without their fans roasting on hot summer days?

12.   Come spring, its retractable roof will open and the lights will reveal a glittering desert diamond.

13.   Computer-generated videos displayed the retractable roof, sliding wall and rollout field in action.

14.   Drawings of the new baseball stadium, which will have a retractable roof for very hot days, hang in the Houston Library.

15.   Empty cans are recycled to make insulated walls, clerestory windows, doors with pivoting can hinges, a can mailbox, even a retractable roof.

16.   Even fewer people probably imagined a retractable roof to cover that stadium on demand.

17.   Even the retractable roof resembles an old train shed.

18.   First reviews of PNC Park, which has no retractable roof, have been glowing.

19.   Giuliani said he wanted the arena to have a retractable roof.

20.   Ground was recently broken on a baseball stadium that will boast a retractable roof, real grass and air conditioning.