11.   An agreement to protect U.N. workers moved a step closer to becoming a formal treaty on Thursday when a dozen countries signed it.

12.   And the two countries this week signed a maritime agreement allowing U.S. anti-drug boats to board suspicious Colombia vessels in Colombian waters.

13.   But now the countries have signed a treaty that may help end this feud.

14.   In addition to strengthening trade ties, the two countries signed agreements to boost their efforts to fight drug trafficking.

15.   In exchange, the country has signed the nuclear non-proliferation treaty, agreed to get rid of its nuclear weapons, and close Chernobyl.

16.   Kids from around the country have signed.

17.   Many countries signed the chemical warfare treaty but are waiting for the United States to act before ratifying.

18.   Neither country has signed the Nuclear Nonproliferation Treaty.

19.   One hundred and sixty countries signed onto it.

20.   One after another Arab country signed peace agreements with Israel and opened trade with the West while Syria sank into a deep economic decline.