1. Three main figures in Ukraine's interior ministry were killed in a helicopter crash near Kyiv, along with 11 other people.
2. The cause of the crash is unknown, but sabotage and technical malfunction are being investigated as possible causes.
3. President Zelensky asked leaders to observe a minute of silence for the lives lost in the crash, and US President Joe Biden expressed his condolences to all victims of the crash.
The article is generally reliable and trustworthy, as it provides detailed information about the incident and its aftermath, including quotes from witnesses and officials involved in the investigation. It also includes statements from President Zelensky and US President Joe Biden expressing their condolences for those affected by the tragedy. The article does not appear to be biased or one-sided, as it presents both sides of the story fairly without taking sides or promoting any particular point of view. However, there are some points that could have been explored further or presented more clearly. For example, while it mentions that sabotage is being investigated as a possible cause for the crash, it does not provide any evidence to support this claim or explore any potential counterarguments. Additionally, while it mentions that Ukraine has appealed to the West for tanks to help respond to any expected new Russian offensive, it does not provide any details about what kind of response has been received so far or what kind of risks may be associated with such an action.