Brakes Pulling

Thanks to everyone for answering to my problem...I have drum brakes front & rear... alignment was checked prior to new wheels & tires...the brakes have been on car for awhile & have been working great until I really had to stop in a hurry then just started pulling from side to side the last time i had it out... I am going to check the brake hoses on the front as now that this was mentioned I remembered having that problem on a truck several years ago, doing the same thing... brake hose being collapsed inside. I will check that out. Thanks again for your ideas... Always nice to be able to bounce ideas off everyone!!!