HECKUVA JOB, JOHNNY: “Mayor Bloomberg yesterday had his ‘Katrina’ moment — hailing his Sanitation commissioner amid a torrent of criticism over the department’s bungling of the blizzard cleanup. Bloomberg warmly praised Sanitation Department boss John Doherty — and promised him his job was safe — in a moment reminiscent of then-President George W. Bush’s infamous endorsement of FEMA chief Michael Brown in the horrific aftermath of Hurricane Katrina.”