Israel beefs up forces on Lebanon border as Hezbollah reports clashes with troops  ReutersHezbollah fights Israeli troops in Lebanon as Israel steps up Gaza attacks  Al Jazeera EnglishLive updates: IDF and Hezbollah clash in Lebanon; Israel, U.S. vow consequences for Iran attack  The Washington PostHow Israel’s Air-Defense System and the Iron Dome Works  The Wall Street JournalIDF soldier killed in combat in Lebanon  Fox News