Members of the ISS crew climbed aboard the Soyuz TMA-13 capsule for about 10 minutes today as a precaution against space debris passing nearby. The threat was called off around 12:45 EDT.
In addition to the 19,000+ pieces of space junk floating around, the recent collision of two satellites has substantially increased the dangers of working in orbit. Close calls like this one may become the norm. [NASA Thanks Ryan]