At his court hearing Thursday, the suspect was charged and ordered to remain in detention. His next hearing was scheduled for 18 June.

"We'll be talking to them," the US president said. "They want to have protection also, so as usual, we help Canada."Trump said that the new Golden Dome defence missile programme would be operational by the end of his time in office, and that it would cost $175bn. He added that he his administration is looking for Canada to "pay their fair share."

But the non-partisan Congressional Budget Office has estimated the eventual price tag could be $542bn over 20 years, on the space-based parts of the system alone.Canada and the US already partner on Norad - a system that is responsible for aerospace and maritime surveillance, warning and defence of the region, and that can detect and shoot down cruise missiles.Norad has been in place since 1958, and both countries in recent years have been engaged in discussions to modernise it.

Trump said the proposed Golden Dome is meant to target increasingly sophisticated aerial weapons, including hypersonic missiles, and will include space-based sensors and interceptors.He said the system would be "capable even of intercepting missiles launched from the other side of the world, or launched from space".

It is partly inspired by Israel's Iron Dome, which the country has used to intercept rockets and missiles since 2011.

Experts have expressed doubts on whether the US would be able to build a similarly comprehensive defence system, given its larger land mass.The quadracycle eCargo bike is being tested by the porter team at Castle Hill Hospital in Cottingham in partnership with East Riding of Yorkshire Council.

It will be in use for a trial period of 12 months, carrying linen, gas cylinders, and other medical equipment and essentials across the site.If successful, the bike, which must be pedalled to gain assistance from the electric motor, will replace a van as part of a drive to reduce carbon emissions and operational costs.

The project was funded by Active Travel England's Capability Fund.Marc Beaumont, head of sustainability at Hull & East Yorkshire Hospitals NHS Trust, said: "The eCargo bike is a fantastic addition to our fleet and will help to contribute to our net zero ambitions.