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hot air ballon
the first manned attempt was made by the montogolifier brothers joseph and etienne -
steam boat
john fitch made first successful trail of forty five-foot steamboat down the delaware river in the pressence of the members of the constitutional convention -
steam powered vehicle
samuel homfray funded development of steam powered vehicle to replace horse drawn carts. -
locomotive
richard trevithic built the first steam engine locomotive. -
american railroads
john stevens is considered the father of the american railroads -
world war 1
cars buses trucks came into use -
space shuttle
the first space shuttle launch -
9/11
on sept 11, 2001 terrisists flew three airplanes into the twin towers
