Russia extends $ 1 billion in credit to Venezuela to finance arms purchases . Secretary of State Hillary Clinton worries about arms race in South America . Clinton urged Venezuela to be transparent about its weapons purchases . Relations tense between Venezuela and neighboring Colombia , a U.S. ally . Venezuela worries about Hugo Chavez 's deepening ties to Iran as well .
Russia extends $ 1 billion in credit to Venezuela to finance arms purchases . Secretary of State Hillary Clinton worries about arms race in South America . Relations tense between Venezuela and neighboring Colombia , a U.S. ally . Venezuela worries about Hugo Chavez 's deepening ties to Iran as well .