Hundreds of protesters are due to start marching from Lincoln to RAF Waddington against the use of armed drone aircraft.
It's the first time the Ministry of Defence has based the spy planes in the UK, which will be deployed over Afghanistan.
Today's march will start at South Park, down the A15 Cross O'Cliff hill and down Grantham Road to a Peace camp set up outside the airbase.
More top news
Quarry threatens Staffordshire's ancient woodland
Following on from the term time holidays row, we look at other rules which have proven controversial.
A man failed not once, not twice but three times when he attempted to raid a bookmakers in Birmingham.