Why Did Israel Cancel Air Force Pilots' Travel Abroad?

In anticipation of an "imminent" Iranian strike, Israel has taken several precautionary measures today, Monday, and in the past few days. Perhaps the most notable action is the decision made by the Israeli Air Force commander on Monday morning to cancel the travel of Air Force pilots abroad. The Israeli army also declared wide areas in the Gaza envelope as military closed zones. Earlier today, Israeli broadcasting agency reported that the Israeli army issued a new order preventing all regular soldiers from staying in Georgia and Azerbaijan, which are close to Iran, due to fears of Iranian retaliation. Prime Minister Benjamin Netanyahu warned government ministers against discussing security matters in the coming days, as it will be "critical." It is noteworthy that a correspondent from Axios news site mentioned earlier that "Israeli intelligence estimates that Iran has decided to attack Israel in retaliation for the assassination of Hamas Political Bureau Chief Ismail Haniya and may do so in the coming days," which is a similar estimate to what Israeli Channel 13 reported, indicating "Israeli assessments that Iran and Hezbollah's response could be this week." In Iran, the deputy head of public relations for the Revolutionary Guard stated that Israel will receive a response to its folly at the appropriate time.