21.   Big enough to contain seven jumbo jetliners, the balloon was pumped up with an experimental mixture of helium and hot air and had several innovative safety features.

22.   Both have similar safety features.

23.   Both programs have built-in safety features.

24.   Both Toyota and Nissan are stressing their expanded safety features, particularly air-bags, which were uncommon in Japan until recently.

25.   A generally less expensive safety feature is the antilock brake system, which remains optional equipment on about half of all car models.

26.   A horn is an important safety feature.

27.   Advanced safety features are also on display.

28.   Ads emphasize its safety features, and Saab says the car has received high ratings in consumer publications.

29.   After the disaster, the Olympic was rebuilt to accommodate new safety features and more lifeboats.

30.   All late-model General Motors cars have this safety feature.