1.   Authorities have struggled to trace the profits.

2.   Authorities are now struggling to figure out when and how to intervene.

3.   Beijing is concerned that lower rates will divert more funds from bank accounts to the stock markets, re-igniting a bull market authorities have struggled to contain.

4.   Beijing is concerned that lower rates for depositors will divert more funds from bank accounts to the stock markets, re-igniting a bull market authorities have struggled to contain.

5.   But even in the land of Microsoft, authorities are struggling to keep up with the technology.

6.   Central military authorities have struggled to get officers to focus less on money making and more on military preparedness.

7.   Federal authorities also are struggling with proposals to cap the number of tours and require air-tour operators to switch to quieter aircraft.

8.   For four days, authorities struggled with uncooperative weather conditions that kept divers idle and with equipment problems.

9.   Law enforcement authorities struggle to identify these remains using composite sketches and clay reconstructions that put faces to skulls.

10.   The stark simplicities of the Cold War behind us, authorities struggle for new ways to deal with a still unsettled world.