GM announced another massive recall of vehicles today involving around 8.4 million vehicles from the 1997 to 2014 model years, the latest in an expanding investigation into defective ignition systems that have been blamed for multiple deaths.That means it has now recalled around 28 million vehicles this year alone, nearly three times what it sold — and more than the 22 million recalled by all automakers — in the year 2013. GM CEO Mary Barra — who just recently took the helm at the troubled automaker — is now weathering the most difficult storm since GMs bankruptcy several years ago. Our customers deserve more than we delivered in these vehicles, she says in the official press release.