Graco Children's Products is recalling 1.9 million infant car seats in what is now the largest seat recall in American history. In the announcement on Tuesday, Graco said that consumers were having difficulty opening the harness buckles used on select infant car seats and were recalling an older model of harness buckle used on infant car seats manufactured between July 2010 and May 2013. To find out more about the recall and to see if your seat is on the recall list, click here.