Picture gallery: Wall Street returns

The NYSE building was draped with the Stars and Stripes

After its longest trading suspension since the 1930s, Wall Street returned to work on Monday. The return had both practical and symbolic value.

Among traders, brokers, and the thousands of others who work in New York's downtown financial district, the mood was grim but determined.

State government employee Allison Clavert covers her mouth as she returns to work

Security around the financial centre has been stepped up, with checkpoints at key junctions

Despite the state of emergency, the vast majority of downtown workers returned to their desks

Investors around the world - including these traders in Madrid - nervously awaited the return of the New York markets

Senator Hilary Clinton and Treasury Secretary Paul O'Neill were among those attending the opening bell

The mood was sombre, with traders setting up American flags as a gesture of defiance

The start of trading was delayed, as the market observed two minutes' silence

Treasury Secretary Paul O'Neill was cheered by the rapid resumption of trading

Markets around the world surged as Wall Street performed better than some had feared

Once trading had begun share prices fell sharply - but not disastrously