Engineers in central Dresden have started the process of demolishing the section of a key bridge and transport route that collapsed a day ago and is in danger of falling apart, according to fire brigade spokesman Michael Klahre. Excavators and demolition vehicles from a specialist company are in operation, Klahre said, as they prepare to partially demolish Bridge Section C, which collapsed into the river below in a night time accident. “The first priority is the sagging area,” said Klahre, noting laser technology showed remnants of that section of the bridge were slowly subsiding. “We are tryi…