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
Waterloo Covered Bridge Waterloo Covered Bridge The Waterloo Covered Bridge carries Newmarket Road over the Warner River near the Waterloo Falls in Warner, New Hampshire. The Town lattice truss bridge was built in 1859-60, replacing an earlier span at the same location, and is one of New Hampshire's few surviving 19th-century covered bridges. The bridge was listed on the National Register of Historic Places in 1976, and included in the Waterloo Historic District in 2003. The Waterloo Covered Bridge is located in western Warner, spanning the Warner River in a roughly northeast-southwest orientation. The bridge is a single span with a span length