Israeli air force F-16 fighter jet Tel Aviv has embarked on another round of large-scale military exercise as speculations of an Israeli-initiated war run high. Israel's Air Force has begun a large-scale military exercise as right-wing parties are insisting on more militaristic approaches. Israeli Air Force's "aircraft activity will be noticeable during the course of the exercise as well as the presence of military vehicles across the country," a military spokesman was quoted by AFP as saying on Monday. The four-day exercise will end on Thursday with military sources saying the move was aimed at testing the Air Force's abilities against rocket attacks and infiltration attempts. The military stages the exercise shortly after the Lebanese security forces disbanded several Israeli spy rings in the country. Lebanese sources say the counterespionage operation which is still underway could change the balance of power against Israel. Israel has twice invaded Lebanon and is reportedly mulling over another attack on the country. In addition, Israel has in recent years repeatedly hinted that it would launch an offensive against Iran. Tel Aviv accuses Tehran of pursuing Atomic bombs trough its nuclear energy program, threatening to target Iran's uranium enrichment facilities. The Islamic Republic, however, maintains that its nuclear program is peaceful and aimed at generating electricity. The presence of a hawkish government in Israel along with stepped-up military exercised prompted Washington to warn Tel Aviv against starting a war with Iran. The speculations of a military strike was so strong that The United States sent its spy chief and CIA director, Leon Panetta, on a secret mission to Israel in early May to warn its leaders against launching a surprise attack on Iran.