In October 1859, the U.S. military arsenal at Harpers Ferry was the target of an assault by an armed band of abolitionists led by John Brown (1800-59).
A tornado appears as a rotating, funnel-shaped cloud that extends from a thunderstorm to the ground with whirling winds that can reach 300 miles per hour. Damage paths can be in excess of one mile wide and 50 miles long. Some tornadoes are clearly visible, while rain or nearby low-hanging clouds obscure others.t is not uncommon to see clear, sunlit skies behind a tornado. 1  Tornadoes cause an average of 70 fatalities and 1,500 injuries in the U.S. each year. 2  The strongest tornadoes have rotating winds of more than 250 mph.
It varies, but the average is about 10 minutes, and the median  duration is about 2 minutes.   However, a tornado can last anywhere from just a few seconds to  over an h â¦ our.The longest lived tornado on record lasted 3.5 hours.+ 57 others found this useful.sually sexual intercourse lasts longer as people get more experienced and know what to expect. But with a new partner it can take time for people to get used to each other. Also every time people have sex it is different, depending on how they feel and what they want.