Overview: Steve Kroft reports on homegrown terror; Plus, Scott Pelley travels withSteve Kroft reports on homegrown terror; Plus, Scott Pelley travels with Sec. of State Hillary Clinton; Also, Morley Safer on people walking out on their mortgages, even though they can afford to pay.; Also, Morley Safer on people walking out on their mortgages, even though they can afford to pay.