At least 20 Palestinians were killed in Israeli strikes on the Gaza Strip overnight and into Saturday, according to local health officials. The 20-month war with Hamas has raged on even as Israel has opened a new front with heavy strikes on Iran that sparked retaliatory drone and missile attacks.

Years of intelligence collection, infiltration of Iran with commandos and weapons, and tracking of targeted commanders and scientists made the wide-ranging attacks possible.

Iran launched retaliatory missile strikes on Israel into Saturday morning, killing at least three people and wounding dozens, after a series of blistering Israeli