1.   But in recent years, manufacturers have been building attachment points into cars and light trucks to accommodate the special tether straps on many child safety seats.

2.   King said a plastic cover on the tether strap appears to be missing, indicating it may have slipped away from a worker.

3.   Tether straps attach to the rear of the safety seat and are attached to the car.

4.   The addition of the tether strap by itself is expected to make the car seat far more stable.

5.   Then they installed a permanent safety wire up the side of the three-story Unity on which they and future astronaut-builders could slide their tether straps.

6.   Starting today, the safety administration is requiring that automakers do their part by beginning to equip new cars with anchor points for the top tether straps.

7.   While some existing seats can meet the stiffer requirement without a tether strap, most cannot.