I am not a political commentator. But anyone not living in a cave has to admit that the past year of American politics was just plain wacky. For those of you for whom English is not your first language, "wacky" is a word that basically means (by my personal definition) "strange, highly unusual and a bit crazy". Which also applies to Donald Trump.
News on the development of drones (also known as Unmanned Aerial Vehicles or UAVs - or UUVs if underwater) is on the rise. The applications for UAV technology to support engineering activity seem endless. However, as with all new technologies, UAVs can potentially negatively interfere with pre-existing operations, laws and regulations, general accepted practice, as well as common decency.
The question of whether waterhammer analysis on new pipe systems is optional or required does not have a definite answer. In some cases it is clear - such as when the pipe system is being designed in compliance with ASME code (see How AFT Impulse Can Help Engineers Comply With ASME Codes). But in many cases it is up to experience and judgment whether or not to perform waterhammer analysis.