The first pictures have been released of US Army Staff Sergeant Robert Bales, the soldier implicated in the massacre of 16 villagers in Afghanistan this week.
Sergeant Bales is enroute from Kuwait to USAG Fort Leavenworth.
He has not yet been charged over the incident.
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Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.