Consider the tenants:
Various Japanese Banks - long since disappeared.
Williams de Broe - part of BBL, bought by ING, but nearly incsolvent in 2005 and sold for virtually nil in 2006.
Bankers Trust - corporately convicted of fraud, unable to trade and bought by Deutsche bank.
Warburg - merged with UBS.
UBS - Lost $42 billion and currently being bailed out by the Swiss government.
Shearson Lehman - became Lehman Brothers and the rest is history.
Babcock & Brown - share price is 5% of last year's price.
AIG Financial Products - currently bringing down its AAA parent with losses on its unhedged 500 billion CDS book.
HBOS - failed miserably, forced to merge with LLoyds TSB.
RBS - failing miserably, 60% nationalised.