updated 12:26 p.m. ET May 31, 2010
SEOUL, South Korea - South Korea broadened efforts Monday to convince(使相信) the world and its own public that North Korea sank one of its warships(军舰), sharing evidence with Russian torpedo(鱼雷) experts and preparing a special briefing for influential bloggers and Twitter personalities.
The persuasion campaign coincided with military exercises in which thousands of South Korean troops practiced fending off(挡开) an attack from the North near the rivals' tense border. The drill(操练), which the army said was routine and unrelated(无关的) to the ship attack, involved building and defending pontoon bridges(浮桥) that scores of tanks used to cross a river as helicopters buzzed(发出嗡嗡声) overhead.
The South is lobbying for(试图通过游说获得) support for U.N. action against the North, blamed for torpedoing the Cheonan warship and killing 46 sailors in March. Winning Moscow's backing would be vital because Russia is a veto-holding(拥有否决权的) permanent Security Council(联合国安理会) member and a traditional ally of North Korea, which denies attacking the ship.