Sen. John McCain lashed out Thursday at protesters who loudly interrupted a hearing with former Secretary of State Henry Kissinger, calling their demonstration “disgraceful” and the protesters “low-life scum.” The incident also raised immediate questions about how the demonstrators could get within inches of Kissinger with no apparent interference. US Capitol Police spokeswoman Kim Schneider said later the force did not “meet the standards expected of the USCP” during the disruption. The protest broke out at the opening of a Senate Armed Services Committee hearing on national security and global challenges, where Kissinger and other prominent former secretaries of state were testifying. Standing inches behind the Nixon-era diplomat, the protesters shouted, “Arrest Henry Kissinger for war crimes.” The disruption lasted about two minutes. As officers led the protesters away, McCain, R-Ariz., who chairs the committee, apologized to Kissinger.