Iran's Revolutionary Guard holds military drill amid tension

A fireball is seen as missiles launch during a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

A missile is launched during a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

A missile is launched during a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

Members of the Islamic Revolution Guards Corps (IRGC) navy participate in a joint exercise called the 'Great Prophet 17' in the southwest of Iran.

Members of the Islamic Revolution Guards Corps (IRGC) navy participate in a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

A missile is launched during a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

Members of the Islamic Revolution Guards Corps (IRGC) navy participate in a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

Members of the Islamic Revolution Guards Corps (IRGC) navy participate in a joint exercise called the 'Great Prophet 17' in the southwest of Iran.

Members of the Islamic Revolution Guards Corps (IRGC) navy participate in a joint exercise called the 'Great Prophet 17', in the southwest of Iran.

Members of the Islamic Revolution Guards Corps (IRGC) navy participate in a joint exercise called the 'Great Prophet 17' in the southwest of Iran.