Drew W. Houston ’05, co-founder and CEO of Dropbox, will be the keynote speaker at this year’s Commencement ceremony.

The MIT Logarhythms perform at the 7th annual Katwalk last Friday. Katwalk, put on by Kappa Alpha Theta, is a philanthropy fashion show whose profits go to the Boston chapter of Court Appointed Special Advocates (CASA), a group that trains volunteers to aid children involved in abuse cases.

Emma L. Frank ’15 and Stephen D. Johnson ’15 perform during Roadkill Buffet’s “A Show of Hands” on Friday night.

On Sunday afternoon in the third floor hallway above the Infinite Corridor, onlookers experienced “MIThenge,” the twice-yearly phenomenon in which the setting sun aligns with the Infinite Corridor.

Members of MIT Swara perform at the Diwali Night celebrations held in Kresge on Sunday. The instrument pictured is the Veena, a plucked string instrument that is an essential component of India’s classical Carnatic music.

By Jessica L. Wass Photo Editor Bicycles chained up outside the student center combined with a shallow depth of field provided for an interesting sight last Sunday. The fall colors in the background lend a colorful atmosphere to the photo, much as the changing leaves have done to all of campus this fall. Aperture: ƒ/1.4 Exposure Time: 1/5000 sec. Sensitivity: ISO 400 Effective Focal Length: 24 mm