Orkut were other social networking sites including Myspace and Facebook. Ning was a more direct competitor, as it allowed for the creation of social networks similar to Orkut's "communities". An Orkut user was also able to add videos to their profile from either YouTube or Google Video with the additional option of creating either restricted or unrestricted polls for polling a community of users. There was at one point an option to integrate GTalk with Orkut, enabling chat and file sharing. Similar to Facebook, users could also use a "like" button to share interests with friends. Users could also change their
VK 30 series famous Tiger I and Panther tanks, and capable opponents to the T-34 if ultimately too late and at too small of a scale to affect the course of the war. The origins of the first VK 30 began with the need for a breakthrough tank, or "Durchbruchwagen" in 1937, resulting in a few successive iterations. Porsche submitted heavily armoured tank designs, but they were unconventional and also unsuccessful. This was dropped in 1938, around the same time as the start of the VK 20 project, in favour of the first VK 30 designs. These were submitted by Henschel and Porsche.