Declining trust in airline safety, a rise in US citizens being detained when reentering the country and growing anti-American sentiment abroad have some rethinking their summer travels.

Travelling abroad used to barely faze Mary S. The American marketing professional estimates she would cross the border twice a year from her southern Arizona home to visit Los Algodones, Mexico nearby. She was also planning on attending a conference this summer in Canada to escape the Southwest US's sweltering heat. But after watching the sweeping new policies enacted by US President Donald Trump over the last three months and a notable rise in US citizens and permanent residents being detained when attempting to re-enter the country, she's having second thoughts.

"There's no way I'm going anywhere near an airport or border crossing," she said.

While Mary said that some of her trepidation is about the recent spate of air control tower staffing issues and near-misses, she's more worried about potential retaliation from her social media posts criticising the Trump administration, and is afraid of being harassed at border crossings. (She requested we not use her full name for the same reasons.)

These worries might have once seemed outlandish, but last week Twitch streamer Hasan Piker – who is known for his criticism of Trump and his pro-Gaza policies – was reportedly detained for hours by federal agents at Chicago O'Hare International Airport after returning from France. Though eventually released, Piker said he was questioned about his views on the Middle East in an interrogation room and asked "Do you like Donald Trump?"

In response, Tricia McLaughlin, the assistant secretary of the Department of Homeland Security posted a statement on social media saying that the interaction was "a routine, lawful process that occurs daily, and can apply for any traveler".

Other high-profile incidents involving the detention of US citizens have some people "freaked out" by the idea of international travel. Pair that with many Americans losing faith in air travel safety following a spate of recent airplane crashes and anti-American sentiment rising in Europe and Canada, and some Americans are putting their international travel plans on hold – if not outright cancelling their trips.

While she says the majority of her clients continue to book and take trips as usual, travel advisor Tamara Lidbom of Anytime Travel Agency has seen some changes. "Lawful permanent residents who are worried they will not be allowed to re-enter the United States based on changing immigration enforcement are just cancelling trips," she said. "They have decided it is safer to vacation in the United States and avoid the potential risks associated with leaving the country and attempting to........

© BBC