The U.S. Department of Homeland Security warned Americans of a "heightened threat environment" on June 22 that could include attacks on U.S. soil. That fear appeared to dissipate when Iran attacked a United States military base in Qatar June 23, injuring no one.

President Donald Trump on Monday announced that Israel and Iran have agreed to a ceasefire, after more than a week of aerial attacks following Israel's attack on Iran's nuclear program. The ceasefire was due to come into effect in the early hours of Tuesday morning,