The green anaconda and reticulated python can both reach 10 metres in length on rare occasions. The python tends to reach great length more often than the anaconda, but the anaconda is far thicker and heavier and is generally considered to be the world's largest snake.
Titanoboa Snake
Medusa, a reticulated python, clocked in at 7.67 meters (25 feet, 2 inches) long in its official world record measurement, on October 12, 2011.
Reticulated pythons – named as such because of the grid-like pattern of its skin – are on average the world’s longest snakes, but adults normally grow an average of between 3-6 m (or, 10-20 ft)
'Largest' is a combination of other measurements such as length, girth and weight. The green anaconda is clearly the largest living species. The reticulated python is the longest only.
http://en.wikipedia.org/wiki/Green_anaco...
Reticulated pythons are the longest. Anacondas are the heaviest.
Probably Obama. I don't know enough about foreign leaders to say that with absolute certainty but it seems a pretty safe bet.
