Rip currents are anomalous occurrences, but they are born out of ordinary, everyday ocean waves. On the most basic level, you can think of ocean waves as travelling fluctuations in water level. Some external force (usually the wind) pushes on the ocean, creating a swell of water, which is passed along the ocean's surface.
In any case, staying in school is important for entering the Military. The length of commitment depends greatly on the chosen Service, required training and a number of other variables. Military personnel may retire after 20 years of service and must retire after 30 years of service. It's best to contact a recruiter to get a clearer picture of what a potential service member's specific situation would call for.
How long do benefits last? The length of time that a benefit lasts depends on the type of benefit you are receiving. Typically, most temporary benefits end once you have reached a complete medical recovery and have returned to work on a full-time basis.