Emergency officials in Oklahoma are assessing the damage after a violent burst of thunderstorms and tornadoes swept across the Midwest overnight, killing at least nine people and injuring dozens more.
More top news
After decades of struggling negotiations both activists and delegates are hoping for some form of landmark agreement.
World Rugby chairman Bernard Lapasset led the tributes, calling Lomu 'a giant' of the game.
Jaw bone fragment studied by British scientist comes from a smaller cousin of the better known Triceratops.