Donald Trump visiting Arlington National Cemetery to pay tribute to the 13 servicemembers killed during the Afghanistan evacuation.NurPhoto/Getty ImagesTrump's campaign staffers engaged in a physical altercation with a cemetery official, a source told NPR.The staffers were stopped and told not to film in a section of the Arlington National Cemetery, per NPR.Trump was there to commemorate the third anniversary of the attack on US troops in Afghanistan.Former President Donald Trump's campaign staffers got into a scrap with an Arlington National Cemetery official over filming in unauthorized sections, NPR reported.Trump was at the cemetery in Virginia on Monday for a wreath-laying ceremony to commemorate the third anniversary of the attack on US troops as they withdrew from Afghanistan.