Each year, his unit carried out up to 350 raids on houses to search for drugs or weapons, often turning up in armoured vehicles like the Sentinel and effecting what is known in the trade as "hard doors" where forced entry is gained using a battering ram.
But the hardest door at Frieze New York isn't found at a private lounge or a collectors' retreat; it's part of an artwork.
Going after the big money is cutting down the plant – it's a harder door to knock on, it's a longer haul, and it won't get you the short-term riches".
Even the city's tourism agency has trumpeted how at Berghain "people of all sexual orientations indulge in debauchery in the basement dark room," but warned that "the face-tattooed bouncer, a bona fide local celebrity, commands what is reputed to be the hardest door in Berlin".
It has jaw-dropping views, the swankiest digs, and the hardest door to get through.
A Jewish man -- who swears he wasn't offended by her guarantee, "this will be harder than door-to-door witnessing" -- tries to help her when she can't pronounce "Guamanian".
One reason is that it is little comfort, in the midst of an economic slump, to be told that life is even harder next door.
For example, ruggeds come with gel-mounted hard drives, doors to protect the connectors and a watertight seal under the keyboard.
