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—— fifth of out emissions, that change will have to take place right here in the heart of every household. james thinks the effort of installing insulation and the radiators would put most people off. 0nce into the transformation that would have to go on and the people that would need to be done in an existing property, then it becomes, right, well, maybe not me, then. every home is different, so there's no easy solution but, despite this, extra money and the government still need homeowners to be willing and able to pay for the change. colletta smith, bbc news, in pontefract. 0ur politica...

Is a irony that they actually decided to hey, they will call them in. what happened? >> well, a key question is, suzanne, did they overextend with the alleged cover and make critical mistakes that led to the arrest? we are learning new fascinating details. they were suburban professionals and some with very nice resumes and many did not lack ambition in keeping up with the neighbors. >> reporter: they tried to blend in by buying into the american dream. a couple of weeks before the arrest, two of the alleged russian spies a married couple bought this boston area townhouse for nearly $800,000. ...