SIOUX CITY, Iowa (AP) — A convicted Nebraska sex offender has pleaded not guilty to Iowa accusations that he sexually assaulted two women in Sioux City. Court records say 30-year-old Zachary Person entered a written plea Thursday to six charges, including sexual abuse by a habitual offender, assault with intent to commit sexual abuse, serious assault and other crimes. No trial date has been set.

The records say he assaulted a woman at Morningside College on Feb. 12, 2017, and another woman the same night at a motel. Nebraska records say Person, from Norfolk, was sentenced in October to 15 to 20 years for trying to assault a woman in Omaha. The Nebraska Sex Offender Registry says he’s also been convicted of sex crimes in 2012 in Dawson County and 2016 in Dodge County.

WAVERLY, Iowa (AP) — A northeast Iowa college has begun bolstering security following reports that a man entered unlocked dorms and bathrooms and harassed female students. The Waterloo-Cedar Falls Courier reports that no charges have been filed against the man. The complaints say he entered dorm rooms and bathrooms at Wartburg College in Waverly in February, touched students without their permission and stole money. Police say charges are likely when an investigation is finished.

Security cameras have been installed in 11 new spots in addition to 30 already located around campus. Locks also will be installed on bathrooms, and motion-sensor light switches will be changed so bathroom lights are always on.

An empty Chinese space station is expected to fall back to earth as soon as today (Friday) and it’s possible pieces of it that survive the fiery reentry may fall on Iowa. Allison Jaynes, a professor of physics and astronomy at the University of Iowa, says Tiangong One will likely come down between now and Monday and there’s a wide path of possible landing spots, including us. “Most of North America, most of the latitudes where people are living are in the path,” Jaynes says, “but that doesn’t mean that you’re going to get hit by any of these pieces because, of course, that chance is extremely small.”

There are many unknowns as to when and where the space station will fall, but Jaynes notes, since 71-percent of the Earth’s surface is water, the odds are better than seven in ten it won’t hit land. “We’re not sure exactly where in its orbit it’s going to start to reenter but the more important thing to look for is if you’re going to be in the path of visibility to see the piece when it comes through the atmosphere,” Jaynes says. “It will glow. You’ll likely be able to see it, even during the day, if you’re in the right spot on the world.”

Launched in 2011, Tiangong — which means “Heavenly Palace” in Chinese — is roughly the size of a school bus and weighs about nine-and-a-half tons. It’s 34-feet long and is filled with all sorts of equipment, large oxygen tanks, two beds and some exercise gear, as well as two large solar arrays or wings. “Most of it will burn up. You might end up with fist-sized chunks coming in to land somewhere on earth,” Jaynes says. “This is one of the biggest things that has reentered the atmosphere so we don’t have a whole lot of data points on this, but from what we know, most of it does get burned up.”

So how should Iowans be conducting themselves over the next few days? Should we be wearing helmets if we dare to go outside? Jaynes says, “You have many thousands of times better chance of winning the lottery in the next few days than you do getting hit by anything coming from space.” The American space station, Skylab, fell in 1979. It was much larger than Tiangong — Skylab was 85 tons or about nine-times heavier — and some large pieces did strike land in Australia. A small town there famously tried to charge NASA a fine of $400 for littering.

(Radio Iowa)