The United States has signed an agreement to boost trade and investment ties with Ukraine, which is on the verge of joining the World Trade Organization this year after a lengthy period of economic reform, U.S. trade officials said on Tuesday.
WASHINGTON  (Reuters) - The United States has signed an agreement to boost trade and  investment ties with Ukraine, which is on the verge of joining the World Trade  Organization this year after a lengthy period of economic reform, U.S. trade  officials said on Tuesday.