1  2  3 

1  _  _  _

2  _  _  _

3  _  _  _


ACROSS
1)  an interest followed with exaggerated zeal
2)  a system for screening luggage in airports; an agent passes a swab around or inside luggage and then runs the swab through a machine that can detect trace amounts of explosives
3)  a quad with a square body


DOWN
1)  a fixed charge for a privilege or for professional services
2)  a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
3)  a doctor's degree in dental surgery

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