President Barack Obama speaks to graduates during University of Michigan commencement ceremonies Saturday.

Melanie Maxwell | AnnArbor.com

AnnArbor.com has been covering President Barack Obama's trip to Ann Arbor and speech at University of Michigan commencement exercises all day.

We have stories, slideshow, video and more. You can find links to all of today's coverage below.

• President Barack Obama to University of Michigan grads: Keep democracy going

Facts about the University of Michigan’s graduation day

• Time Air Force One landed at Detroit Metropolitan Airport: 9:46 a.m.
• Length of Obama’s speech: 30 minutes
• Number of students graduating: 8,500
• Number of people gathered at Michigan Stadium: 80,000 - 85,000, according to U-M; 92,000 according to the White House
• Number of United States presidents that have visited the university: 12
• Last time a sitting U.S. president spoke at commencement: George H.W. Bush in 1991
• Number of people treated by medical personnel in the stadium: 32
• Degree presented to Obama from U-M: honorary Doctor of Laws
• Number of commencement ceremonies Obama has spoken at as president: 3
• Number of honorary degrees Obama has received as president: 2
• President Barack Obama's commencement address 'a great memory' for U-M graduates
• Text of President Barack Obama's speech at University of Michigan commencement
• VIDEO: Watch Obama deliver the commencement speech to the University of Michigan Class of 2010
• SLIDESHOW: Images from Michigan's spring commencement and President Obama
• VIDEO: A behind-the-scenes look at Michigan's spring 2010 graduation and President Obama's speech
• University of Michigan student speaker Alex Marston briefly steals spotlight at commencement ceremony
• First set of triplets to graduate from U-M makes Obama commencement historic in more ways than one
• Hundreds rally for immigration rights outside University of Michigan commencement
• WITH POLL: Reaction to Obama's speech mostly positive from crowd leaving Michigan Stadium after graduation
• Scenes from inside Michigan Stadium leading up to commencement
• Photos of President Obama's helicopters coming in and out of Ann Arbor
• No arrests made near Michigan Stadium today, police say
• Coverage elsewhere: Obama's call for civil political discourse spurs national media discussion
• Scenes from inside Michigan Stadium leading up to commencement
• VIDEO: President Obama arrives at Detroit Metro Airport, leaves in helicopter for Ann Arbor
• What people are saying on Twitter, Facebook and through text message about President Obama
• With Video: Scenes from outside Michigan Stadium as commencement nears
• Live chat: Join us before and during President Obama's commencement address
• Want to see President Obama's speech again? C-SPAN has the video
• Pedestrian and vehicle traffic heavy following University of Michigan commencement
• Media assembled at Detroit Metro Airport, awaiting President Obama's arrival
• 'Numerous thunderstorms' coming through Ann Arbor as Obama commencement dawns
• A look at today's order of exercises for the University of Michigan's Spring Commencement