Millennium Bridge, London people walking caused small sideways oscillations in the bridge, which in turn caused people on the bridge to sway in step, increasing the amplitude of the bridge oscillations and continually reinforcing the effect. On the day of opening, the bridge was crossed by 90,000 people, with up to 2,000 on the bridge at any one time. Resonant vibrational modes due to vertical loads (such as trains, traffic, pedestrians) and wind loads are well understood in bridge design. In the case of the Millennium Bridge, because the lateral motion caused the pedestrians loading the bridge to directly participate with the bridge,
1992 London Bridge bombing by the Crown Prosecution Service office, injuring two more people and bringing the total injured to 31 in the space of just over 24 hours. This was one of dozens of bombs that detonated in London that year, the biggest of which was the Baltic Exchange bombing, killing three people and causing almost £1 billion worth of damage. The IRA maintained this pressure, bombing mainland Britain and especially the city of London as much as possible until the ceasefire of 1994. 1992 London Bridge bombing On Friday 28 February 1992, the Provisional IRA (PIRA) exploded a bomb inside London Bridge