The rampage appears to be not so much a case of a young man slipping through the cracks, as a tragedy in which measured vigilance ended up not being enough.
The general level of official vigilance is up, the more liberal flow of intelligence from allies has led to some important arrests, and a few prudent security measures have moved along smartly.
But one thing Homeland Security can do is to step up vigilance when terrorists take action elsewhere.
As a first line of defense on the mainland, the Chadian governor of the Lake Region set up "vigilance committees," with the help of tribal chiefs.
Responding to the fears, a planter-dominated vigilance committee rounded up slaves in the Second Creek neighborhood, where talk of a conspiracy first surfaced.
"We have stepped up vigilance in all corners, but our people are very hospitable," said Musa Ecweru, Uganda's state minister for disasters.
As American officials stepped up vigilance at ports of entry, some European farmers complained of a double-whammy: their beef is already outlawed here because of mad cow disease.
State governments would also be required to set up vigilance committees, but those agencies' powers would be limited to bringing violations to the attention of district officers and reviewing the implementation of the act.
Reuters, June 3 , 2012 "China to step up vigilance after US Navy focus on Asia Pacific".
Previously, evidence suggests that transcranial direct current stimulation (tDCS) can preserve vigilance performance for up to 6 h.
Security levels can be stepped up, vigilance encouraged and there will be inevitable questions as to whether the killers were on someone's radar and should have been stopped.
