2003 ricin letters lethal dose of ricin in humans provided that exposure is from injection or inhalation. Ricin is easily purified from castor-oil manufacturing waste. It has been utilized by various states and organizations as a weapon, being most effective as an assassination weapon, notably in the case of the 1978 assassination of Bulgarian dissident Georgi Markov. On January 4, 2004 new federal transportation rules took effect which directly affected the over-the-road trucking industry in the United States. The rules took effect with a 60-day grace period and were aimed at reducing fatigue related accidents and fatalities. Called the most far-reaching rule changes
1884 attack on London Bridge The three men had already been under surveillance by the police in America and in Britain. 1884 attack on London Bridge On 13 December 1884, three American-Irish Republicans carried out a dynamite attack on London Bridge as part of the Fenian dynamite campaign. The bomb went off prematurely while the three men were in a boat attaching it to a bridge pier at 5.45 pm during the evening rush hour. There was little damage to the bridge, and no casualties other than the bombers. The men's boat was so completely destroyed the police initially thought the bombers had fled. "The