Does anyone know what time they start in MEM on the 27th?

It says on the website "There will be two opportunities to attend the SkyWest Briefing. Doors will close promptly at 10:00am and 3:00pm."

Do they mean start at 10am and go to 3pm or are there two separate times?

Also it says "You are required to have an online application filled out prior to attending a Group Interviews" but do you have to RVSP to someone or can you just show up?

Thanks