The 1831 London Bridge was certainly historic, as were the London Bridges that preceded it and the one that currently spans the Thames since 1973 becomes more “historic” with every year that passes.
An excerpt from an article entitled “Hacking the President’s DNA”
“More to the point, consider that the DNA of world leaders is already a subject of intrigue. According to Ronald Kessler, the author of the 2009 book In the President’s Secret Service, Navy stewards gather bedsheets, drinking glasses, and other objects the president has touched—they are later sanitized or destroyed—in an effort to keep wouldbe malefactors from obtaining his genetic material. (The Secret Service would neither confirm nor deny this practice, nor would it comment on any other aspect of this article.) And according to a 2010 release of secret cables by WikiLeaks, Secretary of State Hillary Clinton directed our embassies to surreptitiously collect DNA samples from foreign heads of state and senior United Nations officials. Clearly, the U.S. sees strategic advantage in knowing the specific biology of world leaders; it would be surprising if other nations didn’t feel the same.”
The complete article:
http://www.theatlantic.com/magazine/archive/2012/11/hacking-the-presidents-dna/309147/5/