There are goodbye notes - and then there's William Arkin's frustrated farewell to NBC News. Arkin's 2,228-word memo to his colleagues says that his time at NBC News has been gratifying." But he bluntly expresses his displeasure with the "Trump circus," US foreign policy failures, and the state of television news. He's far from the only person in a national newsroom to feel that way. But he is spelling it out in no uncertain terms. Arkin has worked for NBC on and off for three decades, sometimes as a military analyst, sometimes as a reporter and consultant. He describes himself as a scholar at heart, and he has authored numerous books about national security. Friday will be his last day at NBC. Arkin is a sharp critic of what he calls "perpetual war" and the "creeping fascism of homeland security." In his farewell memo, he said the American press is not aggressive enough about covering military engagements. "I find it disheartening that we do not report the failures of the generals and national security leaders," he said. "I find it shocking that we essentially condone continued American bumbling in the Middle East and now Africa through our ho-hum reporting." He said that most of his critiques of NBC apply to the rest of the news media, as well. He also said in the memo that the Trump age led NBC to start "emulating the national security state itself - busy and profitable. No wars won but the ball is kept in play."