Fundamentally, momentum conservation is linked to invariance under space translations. See Noether's theorem. If you want to find a system that does not conserve momentum you should look for situations where space is not uniform, e.g. balls rolling on the surface of a bowl, a planetary system (when the dynamics of the sun is neglected), etc.
Socorro is a city in Socorro County in the U.S. state of New Mexico. It is in the Rio Grande Valley at an elevation of 4,579 feet (1,396 m). In 2012 the population was 8,906.
Socorro, Texas, in El Paso county, is 13 miles SE of El Paso, Texas. The city is part of the El Paso metropolitan statistical area (MSA). The town was originally part of Mexico from the years 1821 to 1848. In 1848, it became part of the state of Texas.