1.   As soon as we crossed the border we began to see signs of poverty.

2.   As soon as we crossed the border, enemy troops started firing at us.

3.   As we crossed the border, the chatter began once again.

4.   Every day more and more desperate refugees were crossing the border into Kenya.

5.   It seems to me a good term, generous and open and suggestive of a willingness to cross established borders.

6.   Large numbers of illegal immigrants crossed the border at night.

7.   Many of the people who cross the border are quickly deported.

8.   Many people cross the border illegally in search of work.

9.   Refugees have been warned not to attempt to cross the border.

10.   Some might say growth would have been still faster if trade and capital had been allowed to cross borders more easily.