There has been considerable speculation on the possibility of using nuclear weapons to cause tsunamis near to an enemy coastline. Even during World War II consideration of the idea using conventional explosives was explored. Nuclear testing in the Pacific Proving Ground by the United States seemed to generate poor results. Operation Crossroads fired two 20 kilotonnes of TNT (84 TJ) bombs, one in the air and one underwater, above and below the shallow (50 m (160 ft)) waters of the Bikini Atoll lagoon. Fired about 6 km ( mi) from the nearest island, the waves there were no higher than 3–4 m (– ft) upon reaching the shoreline. Other underwater tests, mainly Hardtack I /Wahoo (deep water) and Hardtack I/Umbrella (shallow water) confirmed the results. Analysis of the effects of shallow and deep underwater explosions indicate that the energy of the explosions doesn't easily generate the kind of deep, all-ocean waveforms which are tsunamis; most of the energy creates steam, causes vertical fountains above the water, and creates compressional waveforms.  Tsunamis are hallmarked by permanent large vertical displacements of very large volumes of water which do not occur in explosions.
Psychopathy has been associated with commission of sexual crime, with some researchers arguing that it is correlated with a preference for violent sexual behavior. A 2011 study of conditional releases for Canadian male federal offenders found that psychopathy was related to more violent and non-violent offences but not more sexual offences. For child molesters , psychopathy was associated with more offences.  A study on the relationship between psychopathy scores and types of aggression in a sample of sexual murderers, in which % of the sample had PCL-R scores above 20 and % above 30, found that % of those with scores above 30 had engaged in sadistic violence (defined as enjoyment indicated by self-report or evidence) compared to % of those with scores below 30, and total PCL-R and Factor 1 scores correlated significantly with sadistic violence.   Despite this, it is reported that offenders with psychopathy (both sexual and non-sexual offenders) are about times more likely to be granted conditional release compared to non-psychopathic offenders.