Officials concerned Iran may be emboldened after Trump appears to dismiss incident as a possible accident; White House invites House, Senate leaders for briefing

Rhetoric escalates as Revolutionary Guard chief threatens: 'Any enemy that violates the borders will be annihilated'

US Central Command confirms aircraft shot down by surface-to-air missile; Revolutionary Guard says drone switched off tracking equipment; Iran warns US against violating airspace

Gen. Hossein Salami says country is ready for war though no 'intention' for it; US official: Drone was shot down by surface-to-air missile in international airspace

Tehran reportedly used surface-to-air missile; Iran's Revolutionary Guard says it hit Global Hawk as it entered Iranian airspace

Officer says parts from unexploded mine used to attack ships last week similar to bomb made by firm linked to Revolutionary Guards

Release of photos came as US works to convince members of Congress and allies that the accusations against Tehran are true

Parliament speaker backs accusation by claiming, falsely, that US targeted its own ships in WWII

Kokuka Courageous docks at Sharjah, with all crew 'safe and well' after suspected Iranian attack

Testimony from Norwegian-owned Front Altair's staff will be important in determining who is blamed for attack, as US points to Tehran