11.   Prices of Treasury securities collapsed as investors grew wary about the progress of budget talks.

12.   Support columns are smaller and more flexible, or ductile, which means they may deform and sustain damage but they do not collapse as readily.

13.   That rush to drill collapsed as oil and gas prices fell.

14.   The men, who were chained to a wall draped with a black cloth, collapsed as the crowd cheered.

15.   The Spartans, on the other hand, having won the war with Athens, went on to suffer defeat at Thebes and then collapsed as a power.

16.   The undercarriage collapsed as the bomber touched down on a misty runway, making a belly landing.

17.   Trading through the floor-trading linkage, which began in May, collapsed as overnight trading on computer networks soared.

18.   Unable to pull down rebounds, make free throws or handle passes the final eight minutes of the game, George Washington collapsed as Iowa surged ahead.

19.   When he came to power, Azerbaijan was collapsing as a state.

20.   After posting some modest gains in morning trading, stocks collapsed as investors fell prey to worries about rising interest rates, which could eventually cut into corporate earnings.