Cuba mys­tery: What the­o­ries U.S. in­ves­ti­ga­tors are pur­su­ing

U.S. vic­tims re­port hear­ing loss, con­cus­sions

The Republican Herald - - NATION/WORLD - By JOSH le­d­er­man and lauran Neergaard

WASHINGTON — There must be an an­swer. What­ever is harm­ing U.S. diplo­mats in Ha­vana, it’s eluded the doc­tors, sci­en­tists and in­tel­li­gence an­a­lysts scour­ing for an­swers. In­ves­ti­ga­tors have chased many the­o­ries, in­clud­ing a sonic at­tack, elec­tro­mag­netic weapon or flawed spy­ing de­vice.

Each ex­pla­na­tion seems to fit parts of what’s hap­pened, con­flict­ing with oth­ers.

The United States doesn’t even know what to call it. Sec­re­tary of State Rex Tiller­son used the phrase “health at­tacks.” The State Depart­ment prefers “in­ci­dents.”

Ei­ther way, sus­pi­cion has fallen on Cuba. But in­ves­ti­ga­tors also are ex­am­in­ing whether a rogue fac­tion of its se­cu­rity ser­vices, an­other coun­try such as Rus­sia, or some com­bi­na­tion is to blame, more than a dozen U.S. of­fi­cials fa­mil­iar with the in­ves­ti­ga­tion told The Associated Press.

Those of­fi­cials spoke on con­di­tion of anonymity be­cause they weren’t au­tho­rized to pub­licly dis­cuss the in­ves­ti­ga­tion. The AP also talked to sci­en­tists, physi­cians, acous­tics and weapons ex­perts, and oth­ers about the the­o­ries be­ing pur­sued.

Per­haps the big­gest mys­tery is why the symp­toms, sounds and sen­sa­tions vary so dra­mat­i­cally from per­son to per­son.

Of the 21 med­i­cally con­firmed U.S. vic­tims, some have per­ma­nent hear­ing loss or con­cus­sions, while oth­ers suf­fered nau­sea, headaches and ear-ring­ing. Some are strug­gling with con­cen­tra­tion or com­mon word re­call, the AP has re­ported. Some felt vi­bra­tions or heard loud sounds mys­te­ri­ously audi­ble in only parts of rooms , and oth­ers heard noth­ing.

“These are very non­spe­cific symp­toms. That’s why it’s dif­fi­cult to tell what’s go­ing on,” said Dr. H. Jeffrey Kim, a spe­cial­ist on ear dis­or­ders at Meds­tar Ge­orge­town Univer­sity Hos­pi­tal who isn’t in­volved with the in­ves­ti­ga­tion.

To solve the puz­zle, in­ves­ti­ga­tors are sort­ing symp­toms into cat­e­gories, such as au­di­tory and neu­ro­log­i­cal, ac­cord­ing to in­di­vid­u­als briefed on the probe.

There can be a lag be­fore vic­tims dis­cover or re­port symp­toms, some of which are hard to di­ag­nose. So in­ves­ti­ga­tors are chart­ing the time­line of re­ported in­ci­dents to iden­tify “clus­ters” to help solve the when, where and how of the Ha­vana who­dunit.

While Cuba has been sur­pris­ingly co­op­er­a­tive , even invit­ing the FBI to fly down to Ha­vana, it’s not the same as an in­ves­ti­ga­tion with the U.S. gov­ern­ment in full con­trol.

“You’re on for­eign soil,” said David Ru­bin­cam, a for­mer FBI agent who served in Moscow. “The qual­ity of the in­for­ma­tion and ev­i­dence you col­lect is lim­ited to what the host gov­ern­ment will al­low you to see and hear and touch and do.”

Es­pe­cially when you don’t even know what you’re look­ing for.

Sonic de­vice

The first signs pointed to a sonic at­tack. But what kind?

Some vic­tims heard things — signs that the sounds were in the audi­ble spec­trum. Loud noise can harm hear­ing, es­pe­cially high-deci­bel sounds that can trig­ger ear-ring­ing tin­ni­tus, rup­tured ear drums, even per­ma­nent hear­ing loss.

But oth­ers heard noth­ing, and still be­came ill. So in­ves­ti­ga­tors con­sid­ered in­audi­ble sound: in­fra­sound, too low for hu­mans to hear, and ul­tra­sound, too high.

In­fra­sound of­ten is ex­pe­ri­enced as vi­bra­tion, like stand­ing near a sub­woofer. Some vic­tims re­ported feel­ing vi­bra­tions.

And it’s not im­pos­si­ble that in­fra­sound could ex­plain some of what diplo­mats thought they heard.

Though in­fra­sound is usu­ally in­audi­ble, some peo­ple can de­tect it if the waves are pow­er­ful enough. For ex­am­ple, in­di­vid­u­als liv­ing near in­fra­sound-gen­er­at­ing wind tur­bines have de­scribed pul­sat­ing hums that have left them dizzy, nau­seous or with in­ter­rupted sleep. Such ef­fects have prompted fierce sci­en­tific de­bate.

The bal­ance prob­lems re­ported in Ha­vana? Pos­si­bly ex­plained by in­fra­sound, which may stim­u­late cells in the ear’s vestibu­lar sys­tem that con­trols bal­ance, sci­en­tists say.

But there’s lit­tle ev­i­dence in­fra­sound can cause last­ing dam­age once the sound stops.

And the pin­pointed fo­cus of the sound, re­ported by some? In­fra­sound waves travel ev­ery­where, mak­ing them dif­fi­cult to aim with pre­ci­sion.

“There’s no ef­fi­cient way to fo­cus in­fra­sound to make it into a us­able weapon,” said Mario Svirsky, an ex­pert on ear dis­or­ders and neu­ro­science at New York Univer­sity School of Medicine.

elec­tro­mag­netic weapon

It may sound like Star Wars fan­tasy, but elec­tro­mag­netic weapons have been around for years. They gen­er­ally harm elec­tron­ics, not hu­mans.

The elec­tro­mag­netic spec­trum in­cludes waves like the ones used by your cell­phone, mi­crowave and light bulbs.

And they can be eas­ily pin­pointed. Think lasers. Such waves can also travel through walls, so an elec­tro­mag­netic at­tack could be plau­si­bly con­cealed from afar.

There’s prece­dent. For more than a decade ending in the 1970s, the for­mer Soviet Union bom­barded the U.S. Em­bassy in Moscow with mi­crowaves. The ex­act pur­pose was never clear. What about the sounds peo­ple heard? Mi­crowave pulses — short, in­tense blasts — can cause peo­ple to “hear” click­ing sounds. Ac­cord­ing to a two-decade-old U.S. Air Force patent, the Amer­i­can mil­i­tary has re­searched whether those blasts could be ma­nip­u­lated to “beam” voices or other sounds to some­one’s head.

Newspapers in English

Newspapers from USA

© PressReader. All rights reserved.