1.   As Irish officials have tightened entry points at ferry ports and train stations, some people have sought alternative routes.

2.   Alarmed officials tightened building codes to deal with such earthquakes.

3.   Airport officials tightened security in Chicago, in Kansas City, Mo., and in Florida.

4.   In the wake of the Mont Blanc and Tauern disasters, officials are tightening standards.

5.   Los Angeles officials have tightened their building codes, requiring more plywood for wood-frame buildings and stronger welding materials in steel structures.

6.   Nonetheless, officials tightened security around the base.

7.   Officials tightened security at airports across the nation.

8.   Speedway officials have tightened security by discouraging the use of bags and backpacks.

9.   They said they anticipate that Tokyo-based officials will tighten their supervision over foreign operations.

10.   Federal aviation officials tightened security on U.S. planes serving East Asia, imposing a ban Sunday on carry-on aerosols and most liquids.