The boar's head standard was made from sheet bronze. It would have been held aloft in battle like a flag and used as a rallying point for troops.
The BBC spoke with spectators who walked alongside the monks for the last leg of their trek, from Capitol Hill to the Lincoln Memorial.
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"Having Neil with us this year has been great - we of a certain age all know who he is and what he's done, and we're thrilled that he offered to come along and help."
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在数字化时代，数据安全和隐私保护已经成为每个组织必须面对的重要课题。