Parliament was locked down after the attack, and the return to business was seen as an important act of defiance. The silence began at 9:33 a.m., to honour the shoulder number of the murdered officer, Keith Palmer. One of those killed was Aysha Frade, a British national whose mother is Spanish, the Spanish Foreign Ministry said. The Press Association on Thursday quoted an unnamed witness saying that the operation was linked to the attack. Just this weekend, hundreds of armed police took part in an exercise simulating a “marauding” terrorist attack on the River Thames.

Source: National Post March 23, 2017 12:29 UTC