You can see this at play with the hot dog: the sandwich and sausage were both invented elsewhere, so to celebrate them separately as uniquely American on America's day of independence would present an empty gesture, immediately undermined by the tools used to make it.
An Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.n Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.
Crater Lake in the Cascade mountains. Crater Lake was formed from the collapse of Mount Mazama, a volcano in southern Oregon that once stood about 11,000 feet tall. A series of destructive eruptions around 5000 BC caused the mountain's peak to collapse into its lava chamber, resulting in a caldera nearly six miles wide.