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President Barack Obama’s limousine transported him from Building 13 to Kresge Auditorium via Memorial Drive for his address on Oct. 23.

President Barack Obama speaks about clean energy at Kresge on Friday. Obama’s speech followed a tour of several MIT labs that do energy-related research.

On Oct. 23, students who could not get into Kresge gathered in the Stratton Lounge to watch Obama’s speech on their computers.

A supporter of Lyndon LaRouche holds up a painting of the 2008 presidential candidates as she awaited the arrival of Obama to the MIT campus on Friday. “Why is Obama blue?” a bystander asked. “You go in there and ask ...

Demonstrators stirred up heated arguments with bystanders on Oct. 23 as they awaited the arrival of President Obama to the MIT campus. This demonstrator had another hand-lettered sign that read “Arrest obama for war c...

Photographers and video crews pack up supplies after President Obama’s address on Friday in Kresge.

Crowds gather in front of 77 Mass. Ave awaiting the arrival of President Barack Obama to Kresge Auditorium on Oct. 23 for his clean energy speech.

President Obama chats amicably with Massachusetts Senator John Kerry as they both step out of Air Force One. The President’s private aircraft touched down at Logan airport at about 11:30 a.m. on Friday.

Kevin A. Rafferty, Toscanini’s new ice-cream chef, has invented 26 new flavors of ice cream since joining the staff three months ago. Among his new flavors are “Drunken Three Musketeers” and “B3.”

President Barack Obama will be speaking about clean energy at Kresge Auditorium on Friday. Obama is seen here at a campaign stop in Boston in February 2008.

Professor JoAnne Stubbe received the 2009 National Medal of Science for her pioneering work in understanding the enzymes involved in DNA replication and repair.

Picketers from the International Brotherhood of Electrical Workers stand outside Lobby 7 on Wednesday afternoon. Members of the electricians’ union have been protesting MIT’s contracting practices for over five weeks.

Members of the Class of 1954 (from left to right) Joseph Blake, Harvey Steinberg, and MIT President Emeritus Paul E. Gray reminisce at Legal Sea Foods on Wednesday after a memorial ceremony for the late Anna McAlliste...

Zara K. Karuman ’13 performs a handstand on the uneven bars as her teammates look on during gymnastics practice on Thursday in DuPont. Due to budget cuts, the gymnastics team lost its varsity status at the end of last...

Customers make use of the MIT post office in the Student Center on Sept. 21. The post office is one of about 400 branches being considered for closure.