Concrete Windome Community Centers are indestructible, providing a safe haven for the community in times of danger from extreme weather and possible terrorist threats.  The Concrete Windome construction system can be provided in an wide variety of sizes and shapes and is extremely economical and energy efficient.  The color of the ball on top of the marquee along with sound signals announce threats to the community.   The center is stocked with all necessary emergency supplies and equipment to last out a major peril, including but not limited to the following: food and water; emergency generators; communication equipment; emergency vehicles including a heliport; and medical supplies.  It also serves as a recreation facility and meeting place for people of all ages. No community should be without this facility.