From The New York Times:
WASHINGTON — Senator Barack Obama introduced Senator Joseph R. Biden Jr. as his running mate on Saturday, a choice that strengthens the Democratic ticket’s credentials on foreign policy heading into the general election against Senator John McCain.
In Mr. Biden, Mr. Obama selected a six-term senator best known for his expertise on foreign affairs — Mr. Biden spent last weekend in Georgia as that nation engaged in a tense confrontation with Russia — and his skills at political combat.