Evidence for past supernovae is thin on the ground, although in 1999 German researchers found traces of iron-60 in south Pacific sediments ( Physical Review Letters, vol 83, p 18).
"A lot of that traces to the failure, on April 9, to establish immediately physical security in Iraq -- the unparalleled looting and destruction, a lot of which was directly intentioned, designed by the security services to cover the tracks of the Iraq WMD program and their other programs as well, " Kay said.