Don’t know why Lloyd Bentsen Sr. pops into my head every so often, but he does. Probably because he lived to be a healthy 94, still active to the very end, running his business. As I grow older, I realize what a satisfactory goal that is to have in life: Keep moving until you can move no more. Longtime McAllen Mayor Othal Brand was cut from the same cloth. What is sad, though, in a way, is to watch once vibrant people grow less so.Okay, granted, Bentsen Sr. died when he crossed Hwy. 107 one early morning in January 1989,